| |||
up-loop | |||
placement of IUD | |||
upper ring | |||
| |||
upper guide-vane ring | |||
| |||
ringing wildlife, To attach a numbered ring to the leg of a bird so that its movements can be recorded. Ringing is a very common method of tracing bird movement and providing information about bird's ages. It can also cause stress to the birds |
上 环 : 182 phrases in 39 subjects |