在拿不准的情况下，你最好通过其它渠道和好友进行联络确认。
If you're unsure, try to contact them through another channel and see if the link is legit.
这些数据集无疑将为研究人员提供从其它渠道难以获取的信息。
These datasets will undoubtedly provide the researchers access to information that would otherwise be very difficult or expensive to obtain.
他们送到莫斯科的情报都不被重视，除非能被其它渠道所证实。
None of the important information they sent to Moscow was accepted at face value, unless it could be confirmed from other sources.
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