总结式记忆：
表达“胖” plump(丰满的)→heavy(份量重的)→stout(壮实的)→husky(结实的)→strong(很壮的)→well-built(健壮的)
表达“瘦” thin(干瘦)→scrawny(骨瘦如柴的)→bony(瘦骨嶙峋的→skinny(皮包骨)→skin
