The 1990s witnessed a sharp downturn in the party’s fortunes.20 世纪90 年代是该党遭遇严重挫折的时期。The economy has entered a sharp downturn, and unemployment and insolvencies can be expected to increase.经济形势急转直下，失业与破产现象预计将会增多。There was...
Frieda grinned, pinching him on the butt.弗里达咧嘴笑了，捏了捏他的屁股。My sister's always pinching me and it really hurts.我姐姐老拧我，好痛喔。He led his life , pinching and scraping.他省吃俭用地过日子....
This drugs scandal is another blot on the Olympics.这次的兴奋剂丑闻又给奥林匹克运动会抹了黑。That new factory is a blot on the landscape.那新建的工厂破坏了此地的景色There is a blot of ink on the paper.纸上有一滴墨水渍....
In specific acid catalysis, the undissociated acids do not contribute.在特殊的酸催化中, 不离解的酸不起作用.The corresponding reaction of acetaldehyde is subject to general base catalysis.乙醛相应的反应服从广义的碱催化.Catalysis has increased the rate o...