It occurs chiefly as stannic oxide , SnO 2 in cassiterite.主要以氧化物状态存在.One of the key problems in its origin is the solubility of cassiterite in granitic melt.锡石在花岗质熔体中的溶解度,是阐明花岗岩全岩型锡矿成因的关键....
头顶上，直升机在呼啸，巨大的螺旋桨叶片搅动着空气。Overhead, the chopper roared and the big blades churned the air.直升机的旋翼叶片rotor blades on a helicopter推进器的叶片已经安装好了.The propeller blade has been mounted....
The Puritans became fugitives in quest of liberty.清教徒变成了追求自由的逃亡者。Three fugitives from the prison are still at large.三名逃犯仍然未被抓获.The fugitives travelled by night andrested by day.逃亡者夜行而昼伏....
The wires must be insulated from touching each other,with a rubber covering.这些金属线一定要用橡胶皮包起来,以免相互接触。Wires criss-cross between the tops of the poles, forming a grid.电线杆顶端的电线相互交错，形成电线网。He soldered the broken wires together....
Everything he writes demonstrates the acuteness of his intelligence.从他的文笔可以看出他思维敏捷。Everything he writes demonstrates the depth of his sensibility.他笔下的一切都显示出他深深的感悟。The evidence demonstrates how easily people can hold mutu...
The player should now work again normally with the new firmware.这名球员现在应该再次正常工作的新固件.A power failure during the firmware writing operation will disable the camera.固件写入过程中切勿关闭电源.Which version of the 1.5 firmware should I us...