smile是不可数名词。
smilen.微笑；笑容；
v.微笑；笑；微笑着说；
smile的过去式 smiled；过去分词 smiled
She said she was enjoying herself but her smile was forced.
她说自己很快活，但是她的笑容很勉强。
There was a ghost of a smile on his face.
他脸上露出隐隐的一丝微笑。
He never so much as smiled.
他从未笑过。
水利万物而不争,
而万物莫能与之争。
