The main copper minerals are malachite, chrysocolla, little chalcopyrite, chalcosine and even little bornite and covellite. 矿石主要含铜矿物为孔雀石 、 硅孔雀石, 少量的黄铜矿 、 辉铜矿及极少量的斑铜矿和铜蓝等.
她每星期打3次网球。She plays tennis thrice weekly.连本地托儿所每星期都要收费100英镑。Even local nurseries charge £100 a week.女仆每星期换一次床单。Once a week, a maid changes the sheets....
The supporting case is the outer enclosure of the gyro component.支承壳体是陀螺组件的外壳.The pendulum - torque type of erector is extensively employed on gyro verticals.陀螺垂直器上广泛地采用由摆和力矩马达组成的修正装置.The pendulous accelerometer design h...
The news gave a fillip to the telecommunications sector.这个消息给电信部门注入了一针强心剂。technological developments in telecommunications电信技术的发展Futurists agree that these trends will grow as telecommunications networks become cheaper a...
It was a foretaste of things to come.事情初露端倪。It was a foretaste of things to come...事情初露端倪。Summer styles are often a foretaste of autumn fashion.夏装的款式常常是秋装的预兆.This is but a foretaste of what the emerging technologies will...
“我们该怎么办？”米尔顿又用平板而单调的声音问道。"What shall we do?" Milton said again in a toneless voice.米尔顿长长地呼出一口气。Milton let out his breath in a long exhalation.米尔顿被领到了办公室。Milton was shown into the office....
She curried favor with the leader by contemptible means.她用卑鄙的手段博取领导的欢心.Fresh ham, curried beef?鲜火腿?咖喱牛肉?To offset weak traditional loyalties , he has curried favour by lavish ministerial appointments.为了抵消那些传统的忠贞不渝, 他谄媚般慷...