https://online2.tingclass.net/lesson/shi0529/0009/9907/317.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
bone up 抓緊溫習(xí)，突擊鉆研，(考試)臨時抱佛腳
Jack is boning up for his finals.
Jack為應(yīng)付期末考試在突擊學(xué)習(xí)呢。
I need to bone up on my driving skill.
我需要加緊練習(xí)開車技術(shù)了。
瘋狂練習(xí)吧!
