stem

英 [stem]

美 [stem]

n.  (花草的)茎; (花或叶的)梗，柄; (高脚酒杯的)脚; 烟斗柄
v.  阻止; 封堵; 遏止

复数：stems　过去式：stemmed　现在分词：stemming　第三人称单数：stems　过去分词：stemmed　

CET4CET6考研TOEFLIELTSGRETEM4TEM8

Collins.3 / BNC.4527 / COCA.3414

短语用例

stem from sth

• 是…的结果；起源于；根源是
  to be the result of sth

习惯用语

n.

from stem to stern
• 从船头到船尾
  all the way from the front of a ship to the back

牛津词典

noun

• （花草的）茎；（花或叶的）梗，柄
  the main long thin part of a plant above the ground from which the leaves or flowers grow; a smaller part that grows from this and supports flowers or leaves
• （高脚酒杯的）脚
  the long thin part of a wine glass between the bowl and the base
• 烟斗柄
  the thin tube of a tobacco pipe
• 有…茎（或梗）的
  having one or more stems of the type mentioned
  1. a long-stemmed rose
     一枝长茎玫瑰
• 词干
  the main part of a word that stays the same when endings are added to it
  1. ‘Writ’ is the stem of the forms ‘writes’, ‘writing’ and ‘written’.
     writ是writes、writing和written三个词的词干。

verb

• 阻止；封堵；遏止
  to stop sth that is flowing from spreading or increasing
  1. The cut was bandaged to stem the bleeding.
     伤口进行了包扎止血。
  2. They discussed ways of stemming the flow of smuggled drugs.
     他们讨论了遏制走私毒品流通的办法。
  3. The government had failed to stem the tide of factory closures.
     政府没有控制住工厂纷纷倒闭的势头。

柯林斯词典

• VERB 起源于;来自;由…造成
  If a condition or problemstems fromsomething, it was caused originally by that thing.
  1. All my problems stem from drink...
     我所有的问题都源于酗酒。
  2. Much of the instability stems from the economic effects of the war.
     不稳定局面多半是由战争对经济的影响造成的。
• VERB 阻止;遏制;制止
  If youstemsomething, you stop it spreading, increasing, or continuing.
  1. Austria has sent three army battalions to its border with Hungary to stem the flow of illegal immigrants...
     奥地利已派出 3 个营的兵力去本国和匈牙利交界的边境地区阻止非法移民的流入。
  2. The authorities seem powerless to stem the rising tide of violence...
     当局似乎无力阻止愈演愈烈的暴力活动。
  3. He was still conscious, trying to stem the bleeding with his right hand.
     他依然清醒，正试图用右手止血。
• N-COUNT (植物的)秆，茎，梗
  Thestemof a plant is the thin, upright part on which the flowers and leaves grow.
  1. He stooped down, cut the stem for her with his knife and handed her the flower.
     他弯下腰，用刀替她将花茎割断，然后将花递给她。
• (酒杯的)颈，柄脚
  Thestemof a wine glass is the long thin part which connects the bowl to the base.
• N-COUNT (烟斗)柄
  Thestemof a pipe is the long thin part through which smoke is sucked.
  1. He chewed the stem of his pipe and eyed her sceptically.
     他嘴里衔着烟斗柄，满腹狐疑地打量着她。
• (语法中的)词干
  In grammar, thestemof a word is the main part of it, which does not change when the ending changes.
• PHRASE 从船首到船尾
  If something happensfrom stem to sternon a boat, it involves the whole of the boat.
  1. A South African television report said the ship was ablaze from stem to stern.
     南非一则电视新闻报道称，那艘船从头到尾都着了火。

英英释义

noun

• a turn made in skiing
  Synonym:stem turn
• front part of a vessel or aircraft
  1. he pointed the bow of the boat toward the finish line
  Synonym:bowforeprow
• cylinder forming a long narrow part of something
  Synonym:shank
• the tube of a tobacco pipe
• (linguistics) the form of a word after all affixes are removed
  1. thematic vowels are part of the stem
  Synonym:rootroot wordbasethemeradical
• a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
  Synonym:stalk

verb

• remove the stem from
  1. for automatic natural language processing, the words must be stemmed
• stop the flow of a liquid
  1. staunch the blood flow
  2. stem the tide
  Synonym:stanchstaunchhalt
• grow out of, have roots in, originate in
  1. The increase in the national debt stems from the last war
• cause to point inward
  1. stem your skis

双语例句

• Cut them off cleanly through the stem just below the node.
  就从茎节下面，沿茎干把它们全砍掉。
• Sedge is similar in appearance to grass but has a solid rather than a hollow stem
  莎草看上去和普通的草没什么两样，但其草茎是实芯的而不是空芯的。
• The administration is trying to stem the flood of refugees out of Haiti and into Florida
  政府当局正试图阻止大批难民逃离海地，进入佛罗里达。
• He stooped down, cut the stem for her with his knife and handed her the flower.
  他弯下腰，用刀替她将花茎割断，然后将花递给她。
• The fleet from stem to stern covered a thousand li,| its pennons and banners filled the sky.
  舳舻千里，旌旗蔽空。（苏轼《前赤壁赋》）
• Objective To establish an efficient method for isolation and culture of mesenchymal stem cells from mouse bone marrow.
  目的建立一种从小鼠骨髓中分离培养间充质干细胞的高效方法。
• All my problems stem from drink
  我所有的问题都源于酗酒。
• And stem cell and nanotechnology research offer real possibilities for the reanimation of tissue.
  细胞和纳米技术的研究已经可以提供复活这些组织的可能性。
• He pointed at me with the stem of his pipe
  他用烟斗柄指着我。
• In addition to accumulating and preserving these oncogenic scars, a stem cell's enormous proliferative capacity makes it an ideal target for malignancy.
  干细胞除了可累积并保存这些致癌突变外，还具有强大的增殖能力，使它成为癌化的理想目标。