Using this technique helps you oscillate between hard work days and lighter work days to build your capacity and manage your cycles.

通过这种方法你就可以在繁忙的工作日和清闲的工作日之间调节，这样就能管理好你的能力和你的精力周期。

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The Saudis are unlikely to bring new, lighter crude, or bigger refining capacity for their heavier oils, onto world markets until next year.

ECONOMIST: Why the Saudis are worried about the high price of crude

They promise two new e-books this fall that'll be smaller and lighter than the current Rocket and SoftBook models and with more capacity, too.

CNN: Career - E-books: Now in the careerist's bookbag