释义：
adv. 当然；行（用于回答）；必定
例句：
Certainly, I\'ll bring you my book.
当然，我给你带上我的书。
Without his mother\'s support, his plan would certainly fail.
没有母亲的支持，他的计划肯定会失败。
水利万物而不争,
而万物莫能与之争。
