They drilled through several layers of rock to reach the oil.他們鉆透了幾層巖石尋找石油。We had multiplication tables drilled into us at school.以前我們上學(xué)得反復(fù)背誦乘法表.The recruits drilled regularly.新兵們定時(shí)操練....
NOTE: The undersized locator holes are pre - drilled for easy location and assembly.注意: 矮小定位孔預(yù)鉆孔的位置和便于大會(huì).Leaves after feeding silkworm cocoon silk knot, and then drilled for the moth eclosion cocoon shell.桑蠶取食桑葉后吐絲結(jié)繭, 然后...