基本上有两种，用外行话说就是青石棉和白石棉。There are basically two types called, in layman's terms, blue and white asbestos.三种最主要的品种是温石棉, 青石棉和铁石棉.The three most important varieties are chrysotile, crocidolite and amosite.强度按青石棉,温石棉, 铁石棉...
Prisons like Strangeways, built more than 100 years ago, were intended to look grim and foreboding places.诸如斯特兰奇韦斯监狱之类建于 100 多年前的监狱故意营造出一种阴森、不祥的气氛。Disturbances are relatively infrequent in British prisons.相对来说,英国监狱不常发生骚乱...
The dial index will rotate in azimuth, giving an incorrect heading reading.读数示标会绕方位轴转动, 给出不正确的航向读数.Such trilateration is liable to rapid accumulation of azimuth error.这样的三边测量锁的方位误差容易迅速积累.This azimuth motion is known as t...