US officials said there have been at least four previous spy balloons that have drifted over American sites that were of interest to China.
美国官员表示，此前至少有4个间谍气球在中国感兴趣的美国地点上空飘过。
| 单词 | were of interest to |
| 释义 |
were of interest to
原声例句
BBC 听力 2023年2月合集 US officials said there have been at least four previous spy balloons that have drifted over American sites that were of interest to China. 美国官员表示，此前至少有4个间谍气球在中国感兴趣的美国地点上空飘过。 |
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