"But be cautious when making friends" 或者 "But exercise caution when making friends" 是一种很常见的表达方式。这种表达方式源自于谨慎的含义，意思是要小心、谨慎地建立友谊。
下面是一些例句和它们的中文翻译：
It's important to be cautious when making friends onpne. 在网上交友时要谨慎。
Make sure to exercise caution when making new friends. 在交新朋友时一定要谨慎。
Be cautious when making friends with people you don't know well. 在和不熟悉的人交友时要谨慎。
下面是一些例句和它们的中文翻译：
It's important to be cautious when making friends onpne. 在网上交友时要谨慎。
Make sure to exercise caution when making new friends. 在交新朋友时一定要谨慎。
Be cautious when making friends with people you don't know well. 在和不熟悉的人交友时要谨慎。