en-, 进入，使。close, 关住。

1. Please enclose your remittance, making cheques payable to Thames Valley Technology.

请附上汇款，支票收款人为泰晤士河谷科技公司。

2. Please remember to enclose a stamped addressed envelope when writing.

请记得写信时在信封里放一个贴好邮票、写明地址的信封。

3. Please enclose a stamped self-addressed envelope.

请随信寄来一个贴好邮票的回信信封。

4. Make sure you enclose all the relevant certificates.

要保证把所有相关证书都放在里面。

5. I enclose herewith a copy of the policy.

我随信附上一份保险单。