The acid test | عبارة الاختبار الحقيقي لمعدن ...

You are learning three phrasal verbs in this podcast 

تعلم معاني كلمة Dead 

00:23 acid (a.) sharp-tasting or sour 01:10 prodigal (a.) spending money or using resources recklessly and wastefully 02:55 exacerbate (v.) make worse 04:14 coalesce (v.) come together to form one mass or one thing 06:30 acuity (n.) sharpness of thought, vision 中文講解版請看： https://yo ...  Show more

Sometimes the only way to prove your worth, is with a trial by fire. 

Learn an expression used to describe an experimental project. 

Sometimes people need to be on top form and do their best work.