These algae now release their oil, which floats to the surface of the culture vessel.
现在，这些藻类可以释放出藻类油，藻类油能漂浮到培养容器的水面上。
It then floats to the surface of the pond, allowing it to be skimmed off like cream and turned into biodiesel.
然后，油便漂浮在池塘表面，很容易的便可以像油脂一样被刮起来，转变为生物柴油。
“Denial” is a hard book to read, in part because of its subject matter, in part because Ms. Stern’s id floats very near the surface.
《否认》是一本难读的书，一部分原因是它的创作题材，另一部分原因是 斯特恩夫人的自我在很接近表面的地方漂浮。
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