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...
They are mainly forest scavengers infesting damp, rotted wood.它们主要是些森林食腐动物,多侵害潮湿腐朽的木材.The category and scavenging mechanism of free radical scavengers were also presented.概述了自由基的概念、对人体的危害以及自由基清除剂的种类和作用机制.Antioxidants, in...
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...