She is said to be stepping out with actor Matt Dillon.据说她和演员马特·狄龙一起公开露面了。I don't regret stepping out of the security of marriage.我并不后悔放弃了婚姻所带来的安全感。a stepping stone to a more lucrative career涉足更赚钱的行业的敲门砖...
氨基酸是弱酸和弱碱, 因此, 它们是很好的缓冲剂.Amino acids are weak acids and weak bases, therefore, they are excellent buffering agents.缓冲剂可以像烤面包的苏打粉那样使用,它们都能够使ph值保持稳定.Buffers can be used like baking soda will help keep ph stable.着重叙述了缓冲剂原理及...