Because of its trace amount in the nature, it is always prepared by bio - mimetic synthesis methods.

昆布氨酸是昆布中一种具有降压活性的 非 蛋白质氨基酸,在昆布中的含量极少,一般采用仿生合成的方法制得.

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The trace amount of the virus on the mosquito is not sufficient to cause an infection.

艾滋病病毒在蚊子体内既不发育也不会复制,蚊子嘴上残留的血液量微乎其微,远不足以引起传染.

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Trace amount of chromium and nickel was determined using a flow injection line extraction FAAS system.

本文用流动注射-在线萃取火焰原子吸收法测定了人发中微量的铬和镍.

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