前后: around; about试验: experiment; test; trial辐照前后试验: before-and-after test船后试验: behind test交媾后试验: postcoital test (huhner's test)事后试验: post testing滞后试验机: hysteresis tester; hysterometer; hysterometre最后试验: final test麻风预后试验: leprosy prognostic test出钢前的最后试验: final tapping test螺旋桨船后试验: behind ship propeller test; behind shipropeller test维修后试验飞行: maintenance test hop旋前一旋后试验: pronation-supination test滞后试验挠曲计: flexometer for hysteresis test; flexometre for hysteresis test30天后试验动物半数致死的剂量: ld 50/30; lethal dose 50/30前后: 1.(时间接近) around; about 春节前后 around the spring festival2.(自始至终) from start to finish; from beginning to end; altogether 这篇小说从动笔到定稿, 前后用了一年时间。 the novel took a year to write altogether, from start to finish. 他前后来过四五次。 he has been here four or five times altogether.3.(前面和后面) front and back 受到前后围攻 be attacked both front and back; be caught between two fires; 房子前后都是果树。 there are fruit trees in front and at the back of the house前后两激波间气流试验: test for flow结帐后试算: postclosing trail balance最后试航: a shakedown voyage flight trial etc调整后试算表: adjusted trial balance; trial balance after adjustment调整后试算法: adjusted trial balance结帐后试算表: after closing trial balance; after-closing trial balance; balance sheet account; trial balance after closing结账后试算表: after closing trial balance大约,前后: circa前后受敌: be attacked by the enemy both front and back; be caught between two fires前后视水准测量: fore and back level
