A calabash is a light-green vine fruit, also known as opo squash or long melon.
葫芦是一种藤状植物的草绿色果实，又被称为瓠子或者长瓜。
2
Considering the specific requirement of reliability of military lasers, a consolidated intracavity eye safe optical parametric oscillator (OPO) is designed.
考虑到军用激光器对可靠性的特殊要求，设计了一种加固型的内腔式人眼安全o PO激光器。
3
His greatest merit was to have worked with it totally, from opera to opo and operetta.