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- It means that except targeted mutation (TM ), there exits non targeted mutation (NTM), which is the result of genetic instability induced by DNA damaging agents. 即DNA損傷劑除了能直接作用于細胞遺傳物質(zhì)而造成損傷部位的定標性突變(targeted mutation，TM)外，還可能通過(guò)誘導某些基因的表達或功能改變導致DNA復制差錯，從而在未損傷部位形成非定標性突變(non targeted mutation，NTM)。
- Our teacher has mutation of sounds suddenly. 我們的老師突然語(yǔ)音發(fā)生了變化。
- The torpedo homed in on its target. 魚(yú)雷射向目標。
- The company has met their export target. 該公司已經(jīng)實(shí)現了它們的出口目標。
- A stationary target is easiest to aim at. 靜止的目標是最容易瞄準的。
- He shot an arrow, but it fell short of the target. 他射了一箭，但沒(méi)有射中靶。
- He won't hit the target at that distance. 他打不中那樣遠的目標的。
- Shots were fired at the enemy target. 有人向敵軍目標開(kāi)槍。
- You missed the target by a mile/by miles. 你遠未中的。
- He fired several shots (at the target). 他向目標射出了幾發(fā)子彈。
- I aimed at the target but hit the wall. 我瞄準了靶射擊,但卻打在了墻上。
- The movable target on a leveling rod. 視準器水準尺上可移動(dòng)的目標
- The target's getting lower all the while. 指標一直在下降。
- Jack hit the target by a fluky shot. 杰克憑運氣擊中了靶子。
- He hit the target three times without a miss. 他三發(fā)三中。
- His target is to save $100 a week. 他的目標是每周儲蓄一百元。
- Formation or development of a mutation. 變異的形成或者發(fā)展
- His criticism on my mistakes is dead on the target. 他對我的錯誤提出批評，真是一針見(jiàn)血。
- To undergo or cause to undergo mutation. 經(jīng)歷變化或使經(jīng)歷變化
- The target was perforated by bullets. 靶子上全是子彈打穿的孔。
