Laser beams may cauterize and heal ulcers.激光束可以烧灼和愈合溃疡.Lasers cauterize incisions , reducing bleeding and infection, sealing off nerve endings, and minimizing postoperative pain.激光可以麻痹伤口, 减少流血和感染, 封闭神经末梢, 将术后痛苦降低至最小....
There was a lot of unhappiness in my adolescence.年少时我经历过很多不愉快。His laugh-a-minute image is just a front to hide his deep unhappiness.他滑稽可笑的形象只是用来掩饰内心深处痛苦的假面具。He had sensed his mother's unhappiness.他感觉到了母亲的不悦。...
她选了低速挡小心翼翼地沿小径下行。She selected a low gear and started down the track carefully.压下挡杆，直到听到挡挂好。Press the lever until you hear the catch engage.使用自动搅拌器时应该选用慢挡。Electric whisks should be used on a slow speed....