如果列表原来是空的，就调用pthread_cond_broadcast以宣告列表中已经添加了数据。
If the list were originally empty, you call pthread_cond_broadcast to post push data into the list.
昨天，太阳能飞机HB-SIA离开瑞士Payerne机场后本打算尝试24小时飞行，但在飞机数据传输失败后，这一试飞宣告失败。
The HB-SIA aircraft was due to attempt a 24-hour trip from Payerne airfield in Switzerland yesterday, but the trial was halted after the aircraft’s data transmitter failed.
上周公布的数据显示，二季度，欧洲第二大经济体英国持续15年的经济增长宣告中止，陷入停滞。
Figures released last week showed that the U. K. economy, Europe's second largest, stagnated in the second quarter, ending 15 years of economic expansion.
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