This is the 5315th most frequent Chinese word.
乐器
Musical instrument.
Here, '乐器' is used to denote the general category of musical instruments that one can learn to play.
我喜欢学习乐器，比如钢琴和小提琴。
I enjoy learning musical instruments, such as the piano and violin.
In this sentence, '乐器' refers to the assorted types of musical instruments available for sale.
这家商店卖各种乐器，从鼓到吉他应有尽有。
This store sells various instruments, ranging from drums to guitars.
Here, '乐器' is used to highlight the effort and dedication needed in mastering musical instruments.