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1 ?微分作用 derivative absorption spectrum,导数吸收光谱 derivative action;D-action,微分作用；D-作用 derivative action coefficient,微分作用系数 .. 2 ?创意设计 ... C-Action：能力提升 D-Action：创意设计 D-Action 青少年创意设计行动走进...
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The F. D. A. announced in 2007 that it was aware of that problem, but it has taken no action. 食品和药物管理局在2007年宣布它认识到了那个问题，但它没有采取行动。 - 2
"I think action takes place in part d, too," Helen suggested. - 3
Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals. 通过阳光刺激皮肤产生的维他命D可以提供人体90%的需要，但是其也可以通过鱼类，鸡蛋和谷类来提供。
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