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If you fall behind ,you must keep up with the rest of the class：然后你落后了,你必须赶上其他同学

8keep up 赶上,不落后,保持联系,振作,不低落,遵... | If you fall behind, you must keep up with the rest of the class然后你落后了,你必须赶上其他同学 | Try to keep up with the old friends far away 设法和远方...

keep indoors：呆在家里, 不外出

keep in with sb. 与某人友好相处; 不断讨好 | keep indoors 呆在家里, 不外出 | keep it up 不松劲, 照原样继续下去

keep a secret：保守秘密来源

455.keep up with 跟上;不落后;来源:www.examda.com | 456.keep a secret 保守秘密来源:www.examda.com | 457.keep away from 远离来源:www.examda.com

keep keep back：阻止,隐瞒

hold up 阻挡,抢劫 | keep keep back 阻止,隐瞒 | keep down 控制,镇压

keep sb. from doing sth：阻止某人做某事

keep silence 保持沉默(安静) | keep sb?from doing sth阻止某人做某事 | keep up 保持,维持,继续(某活动)

keep in：抑制

keep in with 不断讨好 | keep in 抑制 | keep it up 继续下去

Keep it up：坚持

keep in touch with 与...保持联系 | keep it up 坚持 | keep on 继续进行,反复地做

keep off sth：不接近

4. keep clean 保持整洁 | 5. keep off sth 不接近... | 6. keep up with 追上,赶上

keep on doing sth：继续做某事

453. keep on doing sth. 继续做某事 | 454. keep off 避开;不接近 | 455. keep up with 跟上;不落后;

keep one's distance：保持疏远

keep one's countenance 镇定自若 | keep one's distance 保持疏远 | keep one's end up 精神饱满地对付

video display unit：视频显示部件; 直观显示设备

video display terminal;终端显像器;VDT; | video display unit;视频显示部件; 直观显示设备;VDU; | video distribution amplifier;视频分布放大器;;

sea floor：海床

条目名称 海床(sea floor) 名词解释 是指海洋板块构成的地壳表面,它对陆地形态的演变及地质史有重要影响.