The gyroscope （陀螺仪）will become stable after approximately 15 seconds 陀螺仪将在大约 15 秒 后变得稳定
A.The gyroscope will become stable before less than 15 seconds. B.The gyroscope will become stable for at least 15 seconds. C.After about 15 seconds, the gyroscope will become stable.正确答案C
