9. After doing 100 sit-ups per day, you will have a six-pack look soon.
你每天做100个仰卧起坐后，很快就会有6块肌。
还能这样说：
If you stick to do 100 sit-ups every day, you will possess six-pack stomach sooner or later.
If you can do 100 sit-ups per day, you will soon have a six-pack look.
应用解析：
give a look 望一眼；粗略地看一下；
give a look in 顺便看看；
give sb. a black look 对某人瞪一眼；
good looks 吸引人的仪表；
look about for 四下寻找
10. I work out every day in order to get rid of the fat around my waist.
我每天健身，为的就是消除腰部的脂肪。
还能这样说：
I do exercise per day so that I can work off the fat around my waist.
Strength training can significantly loose fat around my waist.
应用解析：
get rid of 摆脱；除掉；
rid oneself of 摆脱；驱除；解除；
rid oneself of debt 还清债务
11. What facilities do you have at the Rereation and Fitness Center?
你们的健身中心都有什么运动器械？
还能这样说：
Can you tell me the facilities you have at the Rereation and Fitness Center.
What are your facilities at the Rereation and Fitness Center?
12. The pursuit of fitness should be as natural as cleaning your teeth.
从事健身运动应当像刷牙一样自然。
还能这样说：
The pursuit of fitness should be natural, just like cleaning your teeth.
Cleaning teeth is natural, so is the pursuit of fitness.
应用解析：
in pursuit of sb. 追捕某人；
in pursuit sth. 追求某物；
in hot pursuit 穷追不舍