pin是什么意思

The new card you receive will come with a new personal identification number ( ' , PIN).

出自-2017年6月阅读原文

Each time you remember the new PIN, you gradually forget the old one.

出自-2017年6月阅读原文

Because children's brain and behavioral disorders, like hyperactivity and lower grades, can also be linked to social and genetic factors, it's tough to pin them on exposure to specific chemicals with solid 33 statistical evidence, which is what the EPA re

2015年12月六级真题（第一套）阅读 Section A

This suggests that the alleged "Hawthorne effect" is hard to pin down.

2010年考研真题（英语一）完形填空 Section Ⅰ