近年来，随着美国标准考试成绩的下降，一些执政者认为学生需要在教室里花费更多的时间，而不是操场上。

With standardized test scores in the U.S. dropping in recent years, some administrators believe students need to spend more time in the classroom instead of on the playground.

youdao

近年来，随着美国标准考试成绩的下降，一些执政者认为学生需要在教室里花费更多的时间，而不应该在操场上。

With standardized test scores in the U.S. dropping in recent years, some administrators believe students need to spend more time in the classroom instead of on the playground.

youdao

1883年，美国和加拿大采用了标准时间系统。

In 1883, the U.S. and Canada adopted a standard time system.

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