喉咙内壁有白色溃疡状:请帮忙翻译句子,如果学生总是感觉压力很大,他们会有一些不好的行为,例如逃课打架.

If students are feeling pressure, and they have some bad behaviour, such as Taoke 1589. Official language translation, use, and should not be spoken of the language.

上面的翻译有一点语法错误
If the students are always under great pressure ,they will probably behave badly，such as running from the school or fight with each other.

上面都是些口语化的东西，例如逃课竟然翻译成running from the school/skips classes,这让老外怎么理解呢，最起码也应该是run away from classes啊，最好是absence 缺课啊。不好的行为可以意译为不遵守纪律。
所以鄙人认为合适点的翻译如下：

Students will behave badly/not observe the discipline，such as class absence or fighting, if they are under too much pressure.

If the student always felt the pressure is very big, they can have
some not good behavior, for example runs away the class or fights.

If the student always felt the pressure is very big, they can have some not good behavior, for example skips classes fights.

if got so much pressure,the students can have some bad behavior,foe example running away or fighting.