22 six of one and half-a-dozen of the other 半斤八两；没什么区别
23 stick around 在附近逗留或等待
24 stick with 继续做，坚持
25 straighten out 扯平；结清
26 toss and turn （身体）翻来覆去（通常表示难以入睡）
27 turn one's back （在别人遇到困难时）不愿帮助
28 under the weather 身体不适，生病
29 bite off more than one can chew 贪多嚼不烂；心有余而力不足；不自量力；力不从心
30 break new ground 创新