垂直: perpendicular; vertical; squ ...保持: keep; hold; retain; maintain ...会一直保持有效: stop- loss orders使一直保持繁荣: keep the pot boiling我们会一直保持勇气: on and on we carry through the fears保持垂直改变: keeperpendicular change保持针体垂直: keep the needle vertical垂直速度保持: vertical velocity hold多年来他一直保持着收集旧历书的嗜好: he pursued his hobby of collecting old almanacs for so many years经常安全浮泊;一直保持安全浮泊: always safely afloat你一直保持着微笑,但你的眼睛: you always smile but in your eyes你一直保持着笑容,但在你眼里: you always smile but in your eyes我过得很好 而且会一直保持下去: i'm doing fine and i plan to keep it that way身体保持在同一垂直线上: body remains on the same vertical line保持: (维持; 使不消失或减弱) keep; hold; retain; maintain; preserve 保持安静 keep quiet; 保持优势 hold on to a dominant [favorable] position; 保持警惕 maintain vigilance; be on the alert; 保持清洁 keep clean; 保持优良传统 preserve good traditions; 保持劳动人民的本色 retain the characteristics of the working people; 保持冷静的头脑 keep a cool head; keep cool; 保持跳高纪录 retain the high jump record; 保持优良品质 retain the fine qualities; 保持党政机关的廉洁 keep the party and government departments honest and clean; 保持活力 maintain vitality; 保持均势 maintain parity; 保持安全距离 wide berth垂直: perpendicular; vertical; squareness; verticality; perpendicularity 两线垂直相交。the two lines meet at right angles. 设 ab 垂直于 cd。let ab be perpendicular to cd. 当表面与射线垂直时,射线的强度最大。when a surface is perpendicular to the rays, their intensity is at its maximum 垂直垂直度: perpendicularity垂直度;垂直性: verticality保持,保留: retain保持…开心: keep…happy保持(职位): hold down保持,坚持: keeto保持,剩余: remain保持,维护: to maintain(in good repair, condition)保持,振作: keeup