The ground fell away in a broad sweep down to the river.转过一处大弯后，地面消失在与河水相接处。Cross-currents can sweep the strongest swimmer helplessly away.即使最强壮的游泳者也会无助地被交叉水流冲走。They put their chairs on their desks so that the caretaker ...
Pear trees are grafted on quince rootstocks.梨树被嫁接到榅的根茎上。Chinese flowering quince can treat oedema, beriberi, and ameliorable joint.木瓜可治水肿 、 脚气病, 且可改善关节.Is breast enhancement Chinese flowering quince useful to the person ...
介绍了鉴别氯代乙酸的反应原理和操作方法.Reaction principles of chloroacetic acid detection and its operation Methods: Were introduced.表明利用生物技术控制氯代有机物污染的应用前景是光明的.Controlling of chloroorganics pollution by using biological technology has a br...