tightens的意思？

One set of provisions tightens emission standards.一套使排放标准更加严格的规定.Requires no special tools or fittings; hand tightens to relief valve outlet.不需要专用工具或管件; 用手将其紧固到安全阀上即可.The heart tightens at the grandeur we've already...

tightens的音标：...

Aulolepidae的音标：...

v.应用( apply的现在分词 )，[apply oneself]使（自己）致力于，[apply oneself]使从事于，使接触...

n.支持者，拥护者，赞助者( supporter的名词复数 )...

n.水解催化剂...

Self-assertion was not thought seemly in a woman.人们认为女性不应该过于自信。He was correct in his assertion that the minister had been lying.他认定部长说谎，事实果然如此。He attempts to rebut the assertion made by the prosecution witness.他试图反驳原告方证人...

immigrant的复数形式为：immigrants...

“地毯”的英语可以翻译为：carpet，rug，footcloth ...

breakback的音标：breakback的英式发音音标为：[b'reɪkbæk]breakback的美式发音音标为：[b'reɪkbæk]...

照相机， 暗箱， 摄像机， 摄影机...

戴高乐驳回了英国加入欧洲经济共同体的申请。De Gaulle vetoed Britain's application to join the EEC.部长理事会是欧洲经济共同体的真正权力机关.The Council of Ministers is the real power in the EEC.他通过谈判成功地使英国进入了欧洲共同体.He succeeded in negotiating Britain into the...

the taboos surrounding menstruation与月经相关的禁忌Is female menstruation defers ability to come why? Have those a few kinds of reasons.女性月经推迟才来是为什么? 有那几种原因.Hit ketone to still do not come how should menstruation do?打了黄体酮还不来月经该怎...

There are five orders of liverworts , including the Metzgeriales, e . g . Pellia , and the Marchantiales, e . g.叶状体苔类匍匐生长, 叉状分枝, 叶状体上个别细胞加厚....

adj.比较久的，（距离，长度）长的( long的比较级 )，长时间的，（因忙或不愉快等）似乎比实际时间长的，长音的...

If reduced to two pages, it would be the profoundest apercu of the universe that I have ever read.如果缩短到两页, 这将是我所读过的最深刻的宇宙纲要....

n.仓鼠...