发言人克劳普说他不知道具体细节，但是之前传闻内容涉及声纳浮标，它能够识别鲨鱼并传出警告信号。
Klopper said he was unaware of details, but past speculation has included sonar buoys able to identify sharks and transmit a warning signal.
也应教育儿童识别一般的警告信号：如当和陌生人交谈时，过分称赞你的身材或答应给你礼物。
Children should also be taught to recognise common warning signs - such as excessive physical compliments and the promise of gifts - when talking to strangers online.
也应教育儿童识别一般的警告信号：如当和陌生人交谈时，过分称赞你的身材或答应给你礼物。
Children should also be taught to recognise common warning signs - such as excessive physical compliments and the promise of gifts - when talking to strangers online.
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