to submit school or college work to the teacher
向老师提交学校或大学作业 (xiàng lǎoshī tíjiāo xuéxiào huò dàxué zuòyè)
"You must hand in assignments before the deadline."
"你必须在截止日期之前提交作业。" (Nǐ bìxū zài jiézhǐ rìqī zhīqián **tíjiāo zuòyè**.)
to give something your full attention
to miss or overlook something accidentally
to connect someone on the phone
to identify or highlight problems or mistakes
to become emotionally tougher after hardship
to arrive in large amounts, like fog or clouds
