Event types at and above the specified level are traced.
处于和高于指定级别的事件类型将被跟踪。
The proportion of juvenile fish in a catch may not exceed the specified level.
捕捞的渔获物中幼鱼不得超过规定的比例。
The devices sound an alarm when they detect excessive radiation and when the dose exceeds a specified level over time.
当检测到过量的辐射超过一定时间时,机器就会自动报警。
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