There is a price to be paid for maintaining these safeguards.维持这些防范措施是要付出代价的.This paper introduces the maintenance of CDROM and its maintaining method.介绍了光驱的日常维护及常见故障的维修方法.She has been comparatively successful in maintai...
All my attempts to amuse the children were met with sullen scowls.我想尽办法哄这些孩子玩儿,但是他们总是满脸不高兴.Frowns, scowls and grimaces all push people away -- but a smile draws them in. 1.愁眉苦脸只会把人推开, 而微笑却把人吸引过来....