in flank 在侧面，在侧翼

take in flank 侧击

turn sb.'s flank 智胜某人

at one fling 一鼓作气地，一下子，一举

have a fling at sb.讥讽某人

have a fling at sth. 试图做某事

have one's fling 放荡

fling oneself into 奋力从事

flutuate between hopes and fears 喜忧参半

all in a flutter 心慌意乱

cause or make a great flutter 轰动一时

fall into a flutter 心绪不宁

hold the fort 守住堡垒

be foul with 给…弄脏

call a foul 宣判犯规

call one's own foul 宣判自己犯规

fall or go or run foul of 同…冲突