Keep Close Watch Over严密监视
close-over lattice密集点阵;紧装晶格
close-over砂胎
close e over封盖;淹没;遮蔽
keep a close watch over翻译
exercise a close supervision over对严加监督
close-over hexagonal lattice密集六角晶格
close over lattice密集点阵
close the back over关闭背面;在密切的回;关闭回