the expansion and contraction of the metal金属的膨胀与收缩Contraction of the timbers left gaps in the fence.木料收缩,结果围墙露出缝来.The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡....
福赛特机长才拒绝了一位商人的奇怪的请求.Captain Fawcett has just refused a strange request from a businessman.商人的幸福靠运气.A merchant's happiness hangs upon luck.他获得诚实商人的声誉.He won the credit of being an honest merchant....
Chinese herbal medicines have Gentiana, Notopterygium, Cordyceps sinensis, rhubarb and so on.中药材有秦艽 、 羌活 、 冬虫夏草 、 大黄等.In recent years, Gentiana spot blight is the most important disease of Chinese herbal medicines gentia...