阿富汗空军正用直升机向被围城镇提供补给。The Afghan air force was using helicopters to supply the besieged town.这些补给要卸下来装上直升机。The supplies need to be offloaded and put on helicopters.各种补给都不稳定，食品也短缺。Supplies of everything are unreliable, food...
Infectious bursal disease virus ( IBDV ) is an important pathogenic agent of chicken.传染性法氏囊 病毒是鸡的一种重要的病原.The distribution and histology of lymphoid tissue in the Fabricius'bursal stalk were studied.研究了番鸭法氏囊柄部淋巴组织的分布...
We've been on a bit of a downer since the Liverpool game.自从利物浦比赛以来，我们一直有点沮丧。For divorced people, Christmas can be a downer.对离异的人来说，圣诞节令人感伤。Not getting the promotion was a real downer.未得到提升真让人很沮丧。...
你坐在你哥哥的摩托车后面时,要抓牢.Hold tight when you ride at the back of your brother's scooter.我拼命地抓牢树枝.I clung onto the branch for my life.他紧紧抓牢绳子.He kept a fast hold on the rope....