Service ceiling
实用升限
🧩 词语组成解析
service
['sɝvɪs]
n. 服务，服侍;服务业;维修服务;服役;
vt. 检修，维修;向…提供服务;保养;满足需要;
adj. 服务性的;耐用的;服现役的;
serv服务+ice表名词，行为，状态 →服务
🗣️ 情景例句
Hi, Dad. Everything's fine.
嗨 ，爸爸。一切都好。
It is better to die with honour than to live in infamy.
光荣的死胜于羞辱的生。
Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech.
人一旦能用语言同别人交流思想，知识的积累便开始了。