Until recently, most larger-scale batteries were made using nickel and cadmium, but they were heavy, and lacked the long life needed to properly power cars.

直到最近，电池大多是用镍和镉制作的，但是他们太重，缺乏为汽车正确提供动力的长使用寿命。

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Undertaking large scale vaccination campaigns places heavy financial and operational burdens on countries.

开展大规模预防接种运动使国家承受沉重的财政和实施负担。

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Even so, on a scale where 10 was most truthful, native English speakers got a score of 7.5, people with mild accents a score of 6.95 and people with heavy accents a score of 6.84.

10分代表非常可信，即便在被告知的情况下，实验者依然为土生土长的美国人打7.5分，带有轻微口音的人得6.95分，而带有浓重口音的人6.84分。

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However, torque then becomes a problem, requiring huge generators with heavy copper windings that may scale out in the 3-4 MW range.

FORBES: Offshore Wind: Enormous Potential, Huge Challenges

Mr. Lee said that the developer suffered from cash flow issues following heavy investment into large-scale, mixed used projects in recent years.

WSJ: Income-to-Housing Price Gap Narrows in China

There's a hint of graphics prowess amid the halls this week, too, albeit on a vastly smaller scale, and with a heavy heap of civility.

ENGADGET: We're live from SIGGRAPH 2012 in Los Angeles!