Fix cells - Add16% formaldehyde directly into culture medium to obtain a final concentration of 1.5% formaldehyde.

固定细胞-把16%甲醛直接地加入培养基获得一个1.5%甲醛的最后一个浓度。

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The last movement forced a degree of awed concentration out of the listeners, finding release only with the final chord.

终乐章需要听众全神贯注，直到最后一个和弦结束后才能放松下来。

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However, the final nucleus density obtained on gradually increasing the methane concentration from 0.6% to 1.2% is smaller than that deposited at a methane concentration of 1.2%.

但是甲烷浓度由0.6%逐渐增加到1.2%时，所得最终形核密度比一开始就将甲烷浓度设为1.2%的形核密度低。

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Racers follow the stream -- jumping off small cliffs and through waterfalls -- and a final rock face at the base creates one of the last challenges, requiring concentration and crab-walking to climb down.

BBC: An Alaskan-style Fourth of July

Aly Raisman didn't use one in Thursday's all-around final, which her coach, Mihai Brestyan, called a strategy to sharpen her concentration.

WSJ: Social Media