想弄明白用英语怎么说？

想弄明白

例句

• The tramps wanted to know why Lucky never put down the luggage. 两个流浪汉想弄明白,为什么幸运儿总是提着行李不放到地上.
• All night I have been tossing and turning racking my brains to think what could have possessed the young man to kill himself. 整整一晚我辗转反侧,绞尽脑汁,想弄明白是什么原因竟能促成这个年轻人自杀.
• For three years, I have probed for understanding. 3年来，我一直都想弄明白。
• She puzzled over the postmark on the letter. 她想弄明白信封上的邮戳.
• For three years, I have probed for understanding... 3年来，我一直都想弄明白。