一定的英文：
surely
certainly
necessarily
fixed
a certain (extent, etc.)
given
particular

参考例句：
  • The new show is certainly pulling in the crowds.
    新的表演一定很吸引人。
  • Make sure the top is screwed back tightly onto the jar.
    一定要把罐子盖拧紧。
  • I'll help you insofar as I can.
    我一定尽力帮助你。
  • The party on Saturday night is going to be awesome. Booyah!
    周六晚上的聚会一定很棒，哦耶！
  • You must copy it fair.
    你一定要把它抄写清楚。
  • To wander from a set course or point of attention; stray.
    离开一定的路线或注意点;游离
  • Take his vital signs at regular intervals.
    每隔一定时间检查他的生命体征。
  • A lady who is house-proud must also like to keep open house.
    一个讲究家里摆设的女人也一定很好客。
  • The effective permeability is stated as some numerical value at some given saturate conditions.
    有效渗透率用在一定饱和条件下的数值表示。
  • He must have hit the jackpot with the sales of his last gramophone record.
    他卖掉最后的一张留声机唱片，一定赚了大钱。
surely是什么意思：
adv. 当然，无疑
  • brassard: "Sure, sure."
    布拉萨尔:“当然，当然。”
  • Make sure you get there in time.
    一定要准时到达那里。
  • Be sure not to let the truth slip.
    千万别把真相泄漏出去。
certainly是什么意思：
adv. 无疑的，肯定的；当然，行
  • You are certainly a profiteer.
    你真是个奸商。
  • That ring is certainly the cheese.
    那只戒指无疑是精品。
  • You are certainly a talented artist.
    你当然是位有天赋的艺术家。

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