膜还提供结构的支持，对细胞内的结构起固定作用。
Membranes also provide structural support and act to anchor intracellular structures.
欧盟委员会对于欧元区实行固定汇率和单一利率产生的副作用无能为力—各国都被单一货币粘在了一起。
There is nothing the European Commission can do about the side-effects of a fixed exchange rate and a single interest rate for the euro area—they are inherent to a single currency.
氮循环的一个关键组成部分就是——在大气中，将纯净的氮固定为成含氮化合物的形式——这或多或少要完全依赖于生物(闪电仅起一点儿作用)。
One crucial part of this cycle-the fixing of pure nitrogen from the atmosphere into useful nitrogen-containing chemicals-depends more or less entirely on living things (lightning helps a bit).
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