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 ..
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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。
"I think action takes place in part d, too," Helen suggested.
“我认为行动在D部分也发生了。”Helen提出。
Obviously the idea of chalking the dimensions of a soccer pitch over the field at the Meadowlands and catching some holographic World Cup action live in 3-D tickles all of our most sci-fi fancies.
显然第一个是在Meadowlands的球场上用石灰粉画出一个足球场，另外在场边以三维的方式观看全息世界杯直播，确实满足了我们对高科技最美好的想象。
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