send in

英 [send ɪn]

美 [send ɪn]

呈递，提交，邮寄（参赛作品、求职信等）; 派遣，调来（警察、军队等以应付危机或困难）

柯林斯词典

PHRASAL VERB 呈递，提交，邮寄(参赛作品、求职信等)
If yousend insomething such as a competition entry or a letter applying for a job, you post it to the organization concerned.
1. Applicants are asked to send in a CV and a covering letter...
  申请人需要提交一份简历和附函。
2. We're hoping that readers will send in their ideas for saving money.
  我们希望读者能来信说说他们省钱的点子。
PHRASAL VERB 派遣,调来(警察、军队等以应付危机或困难)
When a governmentsends introops or police officers, it orders them to deal with a crisis or problem somewhere.
1. He has asked the government to send in troops to end the fighting.
  他已经要求政府派军队来平息这场战斗。

verb