Once the test, has begun, they have to hold their smile for 10 seconds before a buzzer goes off indicating the test has finished.
当测试开始的时候,他们必须将它们的微笑至少保持10秒,直到听到结束的信号。
Once the test, has begun, they have to hold their smile for 10 seconds before a buzzer goes off indicating the test has finished.
当测试开始的时候,他们必须将它们的微笑至少保持10秒,直到听到结束的信号。
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