滥竽充数，汉语成语，拼音是 làn yú chōng shù，比喻没有本领的人冒充有本领，占着位置，或拿次的东西混在好的里面充数。有时也用作自谦的话。
Indiscriminately, a Chinese idiom, pinyin is làn yú chōng shù, which is a metaphor for a person who has no ability to pretend to be capable, occupy a position, or mix inferior things in a good one. Sometimes it is also used as a self-humble word.
水中捞月，汉语成语，拼音是shuǐ zhōng lāo yuè，意思是到水中去捞月亮。比喻去做根本做不到的事情，只能白费力气。出自《沁园春》。
Fishing for the moon in the water is a Chinese idiom. The pinyin is shuǐ zhōng lāo yuè, which means to fish for the moon in the water. It is a waste of energy to do things that are simply impossible. From “Qinyuanchun”.