“低点”用英语怎么说？

昨天,外汇兑换率下降到低点.The international exchange rate dipped to a low point yesterday.他摆摆手要她把声音放低点.He signed her to lower her voice.从1929年到大萧条的低点1933年,国民总产值几乎下降一半.From 1929 to 1933 - the low point of the Great Depression - Gross...