back and forth motion中文什么意思

back: n. 1.背，背部；背脊；背面，反面；背后，后部，后面， ...
forth: adv. 1.向前，向前方。 2.以后。 3.向外，由隱 ...
motion: n. 1.運(yùn)動(dòng),動(dòng),移動(dòng)(opp. rest)。 2.( ...
back and forth: (前后)來(lái)回地,往返; (前后)來(lái)回地，反復(fù)地; （前后）來(lái)回，來(lái)來(lái)往往; 或前或后；來(lái)來(lái)回回; 來(lái)回,往返,來(lái)來(lái)往往的; 來(lái)回，往返，來(lái)來(lái)往往地; 來(lái)回，往復(fù); 來(lái)回地,反復(fù)地; 來(lái)回走; 來(lái)來(lái)回回的; 來(lái)來(lái)去去; 往復(fù)的
argument back and forth: 前后論證

下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯

When sound waves enter the cochlea , which is really a tube coiled around , they set a membrane into a back and forth motion and cause a new wave
當(dāng)聲波進(jìn)入耳蝸這條盤(pán)旋的管道，它令薄膜前后移動(dòng)并且產(chǎn)生新的波動(dòng)。
Hold the floss tightly between the thumbs and forefingers of both hands , leaving about 2 cm of floss in between . use a back and forth motion to gently slide the floss towards the gingivae between the teeth
用雙手的拇指及食指操縱一段約2厘米長(zhǎng)的牙線(xiàn)，前后拉動(dòng)牙線(xiàn)并慢慢地讓它滑進(jìn)牙縫內(nèi)；

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