13. For a long distance runner, endurance is the most important.
对长跑运动员来说耐力是最主要的。
还能这样说：
Stamina is the most important thing in long run.
The primary thing for a long distance runner is stamina.
应用解析：
at a distance 相距，相隔;
go the distance 赛到底;
keep one's distance 保持一定距离;
distance oneself from sb. 与某人保持距离
14. I ran as fast as my legs could carry me.
我尽量快跑。
还能这样说：
I ran as fast as I can.
I tried my best to run quickly.
应用解析：
carry to excess 做得过分;
carry the can 受责备;
carry weight with sb. 有影响力;
carry out 实现，完成，实行;
carry through 使某人保持勇气
15. Her daily run keeps her slim.
她每天坚持跑步，这使她一直保持苗条的身材。
还能这样说：
She runs every day to keep slim.
She is slim because of her daily run.
应用解析：
slim down (借节食、运动等)减轻体重使体形苗条
16. Jogging is very popular here.
慢跑在这儿很流行。
还能这样说：
Running slowly is in vogue here.
Jogging is prevalent here.
应用解析：
be up to here 饱和;厌倦;
here and there 到处，各处;
neither here nor there 不切题，离题;
here, there and everywhere 到处;
here's to sb. 敬某人一杯
17. I go jogging at half past six every day.
我每天早上6点半去跑步。
还能这样说：
Half past six is the time for me to go jogging every day.
My daily jogging begins at half past six.
应用解析：
and a half 非同小可的，非常出色的，特大的;
do nothing by halves 做任何事都力求完全彻底;
go half and half 均摊某物的费用;
the half of it 最重要的部分