His friends say he was always quick to tell a joke.他的朋友们说,以前他讲笑话总是张嘴就来。He carried on telling a joke, laughing his head off.他继续讲笑话,自己笑得前仰后合。Chinese waiters stood in a cluster, sharing a private joke.华人服务生们站在一起,讲着只有他们自己才懂的...
A bimetallic strip bends when heated.加热时,双金属长条变弯.The fracture toughness of the bimetallic interfaces is lower than those of respective counterpart metals.在扩展路径上,界面和金属交替出现,且界面的断裂韧性不如相应单一材料的断裂韧性.The bimetallic catalyst for...