小鸡炖蘑菇mimi
be sure ；of course[例句]不一定，当然，如果通过沟通，能碰到有缘人是更好的一件事，平常心吧，一切顺其自然。Not necessarily, of course, if through communication can better meet Predestiny is one thing, the sense of balance bar, all letting nature take its course.
KellyYin0816
一定：certain.
例句：
我一定会时刻睁大眼睛提防他的行为。
I shall certainly keep a beady eye on his behaviour.
这项工作必须在一定期限内完成。
The work must be completed within a certain time limit.
我觉得我们一定是在什么地方拐错了路。
I think we must have taken a wrong turning somewhere.
一定要找个宽敞地儿坐得舒服一点。
Make sure you have plenty of room to sit comfortably.
一定要确保所有的门都锁好了再走。
See that all the doors are locked before you leave.
xuemei1987
在一定程度上 to some extent ; partly ; to a certain extent ; in some degree一定的 bound ; definite ; certain ; determinate请一定要通知我 Please keep me informed ; Please keep me accused
无锡白香香
without fail 一定，必定by all means 一定，务必，尽一切办法be bound to 一定会，肯定all to nothing 一定，百分之百must be 一定，一定是
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