上年同期的字面意思为上一年同一段时期，这一时期可以为一星期、一个月或几天等。
非自愿兼职的员工人数仍远高于经济衰退前的人数，但较上年同期减少了64万人，下降了7.9%。
Involuntary part-time employment is still far higher than before the recession, but it is down by 640,000 (7.9 percent) from its year-ago level.
巴西的GDP较上年同期同比增长9%。
Brazil's GDP grew by 9% in the first quarter compared with a year earlier.
破产申请数量较上年同期水平增长14%。
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