Ccna
abbr. 思科认证网络支持工程师（Certified Cisco Network Associate）
🗣️ 情景例句
This afternoon we're going to visit a friend in the hospital.
今天下午我们将去探望一位住院的朋友。
Judy is so reserved that it is hard to understand her.
朱迪非常内向而木讷，因而很难使人了解她。
The shuttle Endeavour will be taking the astronauts to the Hubble.
“奋进”号航天飞机将把宇航员送上哈勃。