皮质醇是一种压力激素,在早上达到最高值。
流产率自1990年达到最高值后持续走低。
The abortion rate also has dropped, reflecting a continuous slide since peaking in 1990.
自从欧元这个统一货币诞生以来,欧元兑日元的汇率达到最高值。
A euro now buys more yen than at any time since the single currency was created.
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