他们时常陷入枯燥的日常事务之中。All too often they become enmeshed in deadening routines.他时常伪装自己。From time to time he will take on a new persona.我拒绝接受帮助的时候时常显得粗鲁无礼。I was often rude and ungracious in refusing help....
Invertase can exist as active monomer ( light invertase ) or as an aggregated active form ( heavy invertase ).转化酶可以活性单体 ( 轻转化酶 ) 或聚集的活性形式 ( 重转化酶 ) 存在.Invertase plays an important role during the sucrose metabolism in hig...
It's the chamois'leaping powers, more than its fleetness of foot, that was astounding.是小羚羊的跳跃能力, 而不是它的奔跑速度使人吃惊.They broke asunder, sidling out of their benches, leaping them.他们忽然散开来, 有的侧身从凳子前挤出去, 有的从上面一跃而过.The ...