⇒ 选课问题成了同学们议论的焦点。 (Xuǎnkè wèntí chéngle tóngxuémen yìlùn de jiāodiǎn.) The problem of choosing courses has become a focus of discussion among the students.
⇒ 她光彩夺目,成了晚会的焦点。 (Tā guāngcǎi duómù, chéngle wǎnhuì de jiāodiǎn.) She was stunningly beautiful and became the focus of attention at the party.