If the flue overdraws, all the heat goes right up the chimney.如果风管抽风过度的话, 热量就会从烟囱直接跑掉了.The flue has become sooted up.烟道里都是黑灰.The fire won't burn because the flue is blocked up.因烟道堵塞火烧不起来.Flue gas desulfurization is ...
She wrinkled her nose, piqued by his total lack of enthusiasm.她皱皱鼻子，为他毫无热情而感到不快。His suit was wrinkled and he looked very tired.他的西服皱巴巴的，整个人显得非常疲惫。I did indeed look older and more wrinkled than ever.我的确比从前显老，皱纹也多了。...
Students all over the country are facing an uncertain future.全国各地学生前途未卜。Both had successful careers and the future looked bright.两个人都事业有成，前程似锦。In the future the machines will need spare parts and maintenance.这些机器将来会需要备件和...