在正常情况下，只有约百分之二十到百分之四十的维生素E被吸收。
Under normal conditions, only about 20 to 40 percent of vitamin E is absorbed.
科技已经消除了我们生活中的许多苦力工作，我们比以往任何时候都更自由：我们可以穿自己喜欢的衣服，点击一下鼠标就可以与数百个朋友交流。
Technology has cut out much of life's donkeywork, and we have more freedoms than ever: we can wear what we like and communicate with hundreds of friends at once at the click of a mouse.
在这种情况下，顶极群落会是最脆弱和最不稳定的，因为它们可能需要数百年才能恢复到顶极状态。
In that case, climax communities would be the most fragile and the least stable, since they can require hundreds of years to return to the climax state.
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