Employment costs rose 2.8 percent in the 12 months that ended in September, slightly less than they did in the year that ended in the previous quarter.
less than they did
less than it did
less than they were
lower than
lower than they were
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less不是用于不可数吗 这里costs可数啊
less不是用于不可数吗 这里costs可数啊
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