回溯测试
This rhythm that I just showed you, you have to go back and see it for yourself.Go through and do some back testing. 我将市场节奏秀给你看了，你最好回去再好好看看，往前看看复复盘。
Rose bushes shoot again after being cut back. 玫瑰丛修剪後还能再长出新枝。
He trudge three hour in the snow to get back home. 他在雪中跋涉三个钟点才回到家。
The crowd fell back to let the players through. 人群后退让运动员们通过。
Do exercise every day and you'll be back in condition. 每天锻炼锻炼，你很快会恢复健康的。
