squarely equivalent to zero

例句：

1. 1. The teacher squarely addressed the issue at hand.
   老师直接解决了这个问题。
2. 2. They squared up against each other without any hesitation.
   他们毫不迟疑地互相对抗。
3. 3. He squared his account with the bank by paying off the debt.
   他通过还清债务与银行结清账目。