These methods are almost always overloaded with an int/TimeUnit pair, indicating how long the method should wait before bailing out and returning control to the program.
By using a pair of artificial muscles to move a weight and generate tremors, his firm's technology provides far more subtle control.
他的公司则采用一对人造肌肉来搬动重物或产生震动，这种技术使控制变得大为精细。
3
Key operations in the control lifecycle are wrapped by a pair of events, one firing before the operation takes place and one firing immediately after the operation has completed.