许可证的英文：
licence
permission
permit

参考例句：

A license to hunt
狩猎许可证

A licensed practitioner of psychoanalysis.
心理分析医生有开业许可证的心理分析医生

Letter of license
许可证

screening permit
放映许可证

Compulsory license
强制许可证

No entrance without a permit.
没有许可证不准入内。

A bogus export permit
伪造的输出许可证

License contract for patent and technology
专利技术许可证合同

Neither import nor export license is required.
免进出口许可证

Do I need to get a fishing permit?
需要取得钓鱼许可证吗?

licence是什么意思：
n. 许可证，执照；放纵
v. 特许；发给执照

fixed pitch licence
固定摊位执照

She is licenced to practice nursing.
她获准从事护理工作。

His driving licence has been endorsed.
他的驾驶执照上有违章记录。

permission是什么意思：
n. 许可；准许；允许；同意

To give or yield permission to or for.
同意给予批准或许可

No dishonesty or conceit whatsoever is permissible in science.
科学来不得半点虚伪和骄傲。

Apply to the publishers for permission to reprint an extract
向出版者请求准予转印节录

permit是什么意思：
v. 允许；准许；使成为可能
n. 许可证；执照；授权；允许；许可

screening permit
放映许可证

No entrance without a permit.
没有许可证不准入内。

The modification was not permitted for security reasons.
由于安全原因不允许修改。