The birds cling to the wall and nibble at the brickwork.鸟儿们紧贴在墙上，啄着砖缝。There were cracks in the brickwork.砖墙上有裂缝。Plaster had fallen away in places, exposing the brickwork.有些地方的灰泥脱落了，露出了砖。...
We had better learn by heart as many sentence patterns as we can.我们最好尽可能多背句型.The text is too long for us to learn by heart.这篇课文太长了,以致我们不能够记住.Irrealizable for my lovingness girl . every little bit, I learn by heart.对最爱的人食...
The extraction of penicillin G with petroleum sulphoxide and di - isooctyl.系统研究了亚砜类萃取剂石油亚砜和二异辛基亚砜萃取青霉素G的性能.A gas chromatography method for the quantitative analysis of isooctyl acid was introduced in this paper.摘要建立了异辛酸合...