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- 二two
- 子midnight
- 整流子头commutator head
- 一窝二子twins at a birth
- 头head
- 必necessarily
- 橡子头导管[医] acorn-headed catheter
- 二子电子倍增器[电] secondary-electron multiplier
- 橡子头探条acorn-tipped bougie
- 扳to pull or draw (up or out)
- 头的cephalic
- 二子样优化算法two-interval optimum algorithm
- 必得must
- 二号2nd day of the month
- 必死die the death
- 二楼second floor
- 帖子post
- 弯头elbow
- 周二Tuesday
- 猎头hunter
