1.a swimming pool
2.need to keep healthy / need to keep in good health
1是一个固定词组
2是need to do sth.keep healthy keep in good health词组
注:keep+形容词,所以一定是healthy
1.a swimming pool
2.need to keep healthy / need to keep in good health
1是一个固定词组
2是need to do sth.keep healthy keep in good health词组
注:keep+形容词,所以一定是healthy