To map 100 mutants by this method would necessitate nearly 5,000 crosses.用这种方法来绘制100个突变型的遗传图就要做5000个杂交.Aspergillus Oryzae mutants . High pressure seems an efficient approach for mutagenesis.继各种化学制剂、各种射线诱变等方法之后, 高压不失为一种行之...
马克非常直率而严肃地说:“你是个懦夫。”"You're a coward," Mark said very plainly and soberly.她的直率让他窃笑。He chuckled at her forthrightness.我喜欢北方人的豪爽和直率。I like the openness and directness of northerners....