而风能，在2009年久提供了全球能源的2%，在2050年将可能增加到20%还强。

Wind power, by contrast, met about 2% of global electricity demand in 2009, and could increase to more than 20% by 2050.

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仅采用强侧呼吸的问题时，时日一久，你的划臂会出现侧顷，且左右侧动作不对称。

The problem with breathing to only one side is that it tends, over time, to make your stroke lopsided and asymmetrical.

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谭会将舞鞋绕着平台补缀，同时，若舞鞋因久穿而变地太软时，谭会用胶在舞鞋内部衬垫处补强以恢复它们原来适当的硬度。

Tan darns her shoes around the platform and, if the shoes have gotten too soft while breaking them in, she'll add glue to the box to get back the appropriate amount of stiffness.

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