put forward v
提出v
以上为机器翻译结果，长、整句建议使用 人工翻译 。
There is a controversial theory put forward by economist Steven Levitt that the increased availability of legal abortion after the Supreme Court ruling in 1973 on Roe v Wade meant that fewer children were born to young, poor, single mothers.
BBC: US crime figures: Why the drop?
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