ratio of construction machinery in

例句：

1. 1. The teacher explained the problem in a ratio of 2:3.
   老师以2:3的比例解释了这个问题。
2. 2. The ratio of sugar to water in this recipe is 1:1.
   食谱中糖和水的比例是1:1。
3. 3. The team's performance was 50% better than last year's ratio.
   该队的表现比去年提高了50%。