But efficiency gains would not be enough.
但是，仅靠提高效率是不够的。
Overall efficiency gains in the use of water could be large.
用水高效产量整体非常可观。
Pay rises ran well ahead of efficiency gains in all these countries.
在这些国家，工资上涨远比效率提高快。
Pay rises ran well ahead of efficiency gains in all these countries.
在这些国家，工资上涨远比效率提高快。
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