单词	diffusion--tracer
释义	tracer， diffusion扩散示踪剂
随便看	to present a card, as a visitor to present a document to present a memorial to present a memorial kneelingly to present a memorial to the emperor to present an offering to present a petition to present arms to present at court to present at court to the emperor to present a visiting card to present food to a superior to present for examination to present offerings to present (offer) with both hands to present or offer to a superior to present papers to present sacrifices to present skins and horses to present skins (furs) and horses, as a tartar to present taxes or tribute to present the ticket of cabinet candidates to present to to present to a superior to present to a superior (as presents, etc.)