keep to

英 [kiːp tu]

美 [kiːp tu]

遵守; 履行; 不偏离，不离开（道路等）; 不偏离（主题）; 不跑（题）; 把…限制在（某一数量）

柯林斯词典

PHRASAL VERB 遵守；履行
If youkeep toa rule, plan, or agreement, you do exactly what you are expected or supposed to do.
1. You've got to keep to the speed limit...
  你必须遵守限速规定。
2. He had been unable to keep to his schedule.
  他没能遵循自己的计划。
PHRASAL VERB 不偏离，不离开（道路等）
If youkeep tosomething such as a path or river, you do not move away from it as you go somewhere.
1. Please keep to the paths.
  请顺着这些小路走。
PHRASAL VERB 不偏离（主题）；不跑（题）
If youkeep toa particular subject, you talk only about that subject, and do not talk about anything else.
1. Let's keep to the subject, or you'll get me too confused.
  别跑题，否则你会把我搞糊涂的。
PHRASAL VERB 把…限制在（某一数量）
If youkeepsomethingtoa particular number or quantity, you limit it to that number or quantity.
1. Keep costs to a minimum.
  将花费降到最低。