boringadj.令人厌烦的;乏味的
boring depth镗孔深度
boring-bar镗杆
boring casing钻探套管
boring rocket钻孔火箭
boring-core岩心
boring anchor钻座
boring pillar钻机台座
boring cancer穿通性癌
boring cutter镗刀
boring sponge穿孔海绵