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The performance had to be stopped when the actor fell off the stage and had his left leg broken.
The performance had tobe stoppedwhen the actor fell off the stage and had his left leg broken.
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The performance had tobe stoppedwhen the actor fell off the stage and had his left leg broken.
HPLC(high performance liguid chromatography)。
performance guarantee(performance bond、performance security)
They are not______with the performance of the students, (satisfy)