天青石一般是成岩期的,但通常是在沉积史的极早期形成的.Celestite is usually diagenetic but commonly forms very early in the history of the sediment.天青石持有光之语中水下世界的振动.Celestite holds the vibration of underwater worlds in the language of light.论述了某天青石...
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...