Fiberoptronics
纤维光电子学
🗣️ 情景例句
Things are never as bad as they seem.
事情往往不像看上去的那么糟。
Where is the telephone office?
电话局在什么地方？
What was the population of the less developed countries in 1950?
1950年不太发达国家的人口是多少？