1942年6月,英国第八军全面撤退.In June 1942, the British 8th Army was in full retreat.损失数百人之后，他们的士兵被迫灰溜溜地撤退。Their soldiers had to retreat ignominiously after losing hundreds of lives.如果战势恶化，军队可能得到增援，或不光彩地撤退。If fighting worsens, the t...
She scraped the mud off her boots.她刮掉了靴子上的泥。He scraped his boots clean before coming into the house.进屋前他先把靴子擦干净.The ashes must be scraped out from the stove.炉里的灰必须掏尽....
染色体也决定动物的性别.Chromosomes also determine the sex of animals.四种染色体的每一种都沿着纵向分裂.Each of four chromosomes divide longitudinally.利用显微镜检查细胞染色体可以发现胎儿的性别。Microscopic examination of a cell's chromo-somes can reveal the sex of ...