One of the fishing boats sank down astern of us.有一艘渔船在我们后面沉没了.He cut the rope then and went astern to noose the tail.然后他割下一截绳子,走到船梢去套住鱼尾巴.The captain was astern, pretending he was sleeping.船长在船尾，假装睡着了。A keg bobbed up ast...
他的论文几乎可以经受住最专业的审查。His papers were proof against all but the most expert of scrutinies.英国制造业未能经受住20世纪70年代危机的考验。British manufacturing failed to meet the crisis of the 1970s.他们的房子盖得十分坚固，经受住了主震。Their house, which was solidly...
Age structure is a foundational base to study the population dynamics.年龄结构是研究种群动态的重要基础.Objective To search for triterpene glycoside with new structure.目的:寻找结构新颖的三萜皂苷类化合物.The photosphere has a granular structure.光球还有颗粒结构。...
Wally was laughing fit to burst.沃利快要笑破肚皮了.He carried on telling a joke, laughing his head off.他继续讲笑话，自己笑得前仰后合。When I stepped into her box, Marguerite was laughing uproariously.当我走进包厢的时候, 玛格丽特放声大笑.We all just cracked up l...
...a demand for a greater choice of effective contraceptive methods...对于更为多样的有效避孕方法的需求It and removed by a hysteroscope and is expected to be aand permanent intratubal contraceptive device.结果表明,输卵管聚乙烯节育栓有望成为经宫颈途径持久的避孕器.Th...
Currency-conversion costs remain one of the biggest obstacles to cross-border trade.货币兑换成本仍是跨境贸易的最大障碍之一。Creative people are usually very determined and thrive on overcoming obstacles.富有创造力的人一般都意志非常坚定，能不断克服困难，事业蒸蒸日上。To su...
这一点是指其身体上的发光斑或发光点.This may show as luminescent blotches or spots on the body.我们将它称为光束的 “ 光斑尺寸 ”.We will consequently refer to it as the beam'spot size ".如果孔是圆形的, 那么在屏幕上出现一圆形光斑.If the aperture is circular, a circular...