Assume anyone asking for your account information for any reason is guilty of scamming you， unless proven innocent. The way to prove innocence is to call them back， or login to your account using numbers or a website that you provide， not them. Don’t release any identifying information while they are contacting you via phone， message or email. You must control the channel.

The complexity of viruses reminds us how much we still have to learn about biology.

可持续经济增长的关键在于全要素生产率的持续提升。

Every piece of leather tells a story; our job is to make it a good one.