請問這句話有錯嗎?
出處
NEW TOEIC TEST 金色證書 聽力 p134
前後文
These balls build up your body's internal muscles, and in doing so they help stabilize and strengthen the lower back, which is probaly the most commonly injured area for our listeners. The first thing you want to do is make sure you buy the right size. You can buy the in sizes up to 70 centimeters, for all you tall folks out there.
因為這是用英語唸的,所以我想是不是和口語比較有關係呢?
更新1:
rhody , 您說的句型能再補充一下嗎? 我實在是看不懂這種句型也。想不出個所以然來。