准许某人加入的英文表达可以是 "allow someone to join" 或 "grant someone access/admission"。
其中，"allow" 是一个动词，意思是 "允许，准许"。"To join" 是一个动词短语，意思是 "加入，参加"。
例句：
Can you allow me to join the meeting? (你能准许我参加这次会议吗？)
The club allows new members to join anytime. (俱乐部随时允许新成员加入。)
"Grant" 是一个动词，意思是 "给予，授予"。"Access" 和 "admission" 都是名词，意思是 "入场，进入"。
例句：
The company granted me access to their database. (公司给予我访问他们的数据库的权限。)
The school granted her admission to the honors program. (学校授予她进入荣誉课程的资格。)
其中，"allow" 是一个动词，意思是 "允许，准许"。"To join" 是一个动词短语，意思是 "加入，参加"。
例句：
Can you allow me to join the meeting? (你能准许我参加这次会议吗？)
The club allows new members to join anytime. (俱乐部随时允许新成员加入。)
"Grant" 是一个动词，意思是 "给予，授予"。"Access" 和 "admission" 都是名词，意思是 "入场，进入"。
例句：
The company granted me access to their database. (公司给予我访问他们的数据库的权限。)
The school granted her admission to the honors program. (学校授予她进入荣誉课程的资格。)