allege：v.(未提出证据)断言，指称，声称

assert：v.明确肯定;断言;坚持自己的主张;表现坚定;维护自己的权利(或权威)

相关介绍

allege例句：

He was also alleged to have conducted black magic ceremonies

据称他还做了法。

She has strong feelings about the alleged growth in violence against female officers

据称针对女警的暴力事件有所增加，她对此十分愤慨。

assert例句：

She continued to assert that she was innocent.

她仍然坚称自己无辜。

The people have asserted their power and that will be very difficult to reverse.

人民已经维护了其当家作主的权力，这将难以改变。