Estes
(este 的复数) abbr. 工程的特殊试验设备（Engineering Special Test Equipment）
🗣️ 情景例句
About 9:30.
大约九点半。
You'll regret it if you don't go.
不去你会后悔。
They also have the disadvantage of being an expensive form of transport.
飞机另一个缺点是昂贵。