当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.他们将不得不彻底放弃某些研究。They'll hav...
By using the complementation test an unknown mutant can be rapidly assigned to a particular gene.采用互补测验可迅速地将某一未知突变型归属于某一特定基因.When the cells were then shifted to an enriched medium, the mutant cells proliferated.然后,当细胞移入一...
有一样东西掉到地板上又滚到床沿挂布的下面.Something dropped on the floor and rolled beneath the valance of the bed.戒指滚到床沿挂布的下面.The ring has been rolled beneath the valance of the bed.他弯下身撩起床沿的挂布.He stooped and lifted the valance....