The extraction mechanism of palladium in chloride system by di ( 1 - methyl heptyl ) acetamide ( N _ ( 503 )) has been studied. 本文研究了N, N二 甲庚基乙酰胺 ( N_ ( s03 ) )从氯化物体系中萃取钯的机理.
The local people bartered wheat for tools.当地人用小麦换取工具。They bartered farm products for machinery.他们用农产品交换机器.The mountaineers bartered between each other.山民们彼此以货易货....
All contestants competed stark naked.所有参赛者都一丝不挂地参加比赛。He was streets ahead of the other contestants.他比其他参赛选手水平高出一大截。Two candidates are emerging as contestants for the presidency.两位候选人最终成为总统职位竞争者....
A NEW SPECIES OF GENUS CONTRACAECUM ( ORINTOCAECUM ) FROM EUROPEAN WHITE PELICAN ( ASCARIDATA: ANISAKIDAE )寄生于鹈鹕的对盲囊线虫一新种 ( 蛔亚目: 异尖科 )An Anhinga — a pelican relative — stretches its wings to dry its feathers.一只美洲蛇鸟——塘鹅的一...