例句與造句

1. However, trombonists, unlike other instrumentalists, are not subject to the intonation issues resulting from valved or keyed instruments, since they can adjust intonation " on the fly " by subtly altering slide types of trombone also include one or more rotary valves used to increase the length of the instrument ( and therefore lower its pitch ) by directing the air flow through additional tubing.
2. It's difficult to find types of trombones in a sentence. 用types of trombones造句挺難的