人老了,关节也硬化了.The man is getting old and his joints are stiff.塑料被注入模子后,便放在一边让它慢慢凝结硬化.The plastic was poured into the mold and left to set until it was firm.高温使陶土硬化。Great heat indurates clay....
As people grow older they generally become less dexterous.随着年龄的增长，人通常会变得不再那么手巧。He carried the others off their feet, glib, dexterous, voluble.他叫大家发起狂来,讲得口若悬河, 伶俐乖巧, 滔滔不绝.The manager was dexterous in [ at ] handling his s...
He straightened up and slipped his hands in his pockets.他挺直身子，把手插进口袋里。My sister had come in with her calm common sense and straightened them out.我姐姐凭着自己的镇定和常识帮着把这些问题都解决了。Each time he straightened his pudgy knees it was a...
鱼类的鳃与陆上动物的肺类似.The gills of fishes are analogous to the lungs in terrestrial animals.鱼用鳃吸氧气.Fish take in oxygen through their gills.鱼和蝌蚪都有鳃.Both fish and tadpoles have gills....