位于阿灵顿的美国国家科学教师协会执行理事杰拉尔德·惠勒表示，这份新报告“来得正是时候”。
The new report "couldn't come at a better time", says Gerald Wheeler, executive director of the National Science Teachers Association in Arlington.
位于阿灵顿的美国国家科学教师协会执行理事杰拉尔德·惠勒表示，这份新报告“来得正是时候”。
The new report "couldn't come at a better time", says Gerald Wheeler, executive director of the National Science Teachers Association in Arlington.
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