A tooth which has been hit hard may discolour.受过重击的牙齿可能会变色。A tooth which has been hit hard may discolour...受过重击的牙齿可能会变色。Benzoyl peroxide can cause fabric to discolour on contact. Use with care.过氧化苯可能导致织物脱色, 请小心使用.Plastic...
A tooth which has been hit hard may discolour.受过重击的牙齿可能会变色。Plastic tends to discolour with age.塑料久而久之便会退色。Benzoyl peroxide can cause fabric to discolour on contact. Use with care.过氧化苯可能导致织物脱色, 请小心使用....
It was just an ordinary voice, but he sang in tune.他声音很一般，但唱得都在调子上。At tea-time, Victoria sang duets with her Consort, Prince Albert.喝下午茶的时候，维多利亚与其夫君艾伯特亲王表演了二重唱。Caroline sang two verses and the chorus of her song.卡罗琳唱了她歌曲...
联轴器是把相邻的两个轴端连接起来的装置.A coupling is a device for connecting the ends of adjacent shafts.主要有齿轮 、 轴 、 泵体 、 安全阀 、 轴端密封所组成.This series are mainly gear , gear pump , valve, pump body, axial end seal.敞开操纵不正护罩, 发不隐轴端动拉螺母已松不静.Open...
a kilometre and a half of bitumen一公里半的柏油路面contain bitumen含沥青The irradiation stability of bitumen and bituminized producthas been investigated.本文研究了沥青及沥青固化产品的辐照稳定性.The article introduced the category of natural bitumen an...