题解用英语怎么说

题解的英文：
notes
key (to exercises)

This book is the key for use of students only.
这本书是专供学生用的题解。

See the introductory note to "The Present Situation and Our Tasks" of this volume.
参看本卷《目前形势和我们的任务》一文的题解。

a note of protest
抗议照会

This is the tonic note.
这是主音音符。

The unstressed note or notes introductory to a phrase or composition.
轻音符介绍乐曲或作品的未加强的一个或多个音符

We have a key for the door of the house and a key for starting the car.
我们有房间门的钥匙和发动汽车的钥匙。

I left the key in the lock.
我把钥匙留在锁上，忘了取下来。

He fished in the bag for the keys.
他在袋子里摸找钥匙。

The exercise is that difficult!
练习题那么难！

morning exercises and setting - up exercises duringthe break
早操和课间操

Exercise stimulates the flow of blood.
锻炼促进血液循环。