I think we should take care of the environment, so that we have something to leave for our children.
我觉得我们应该保护好自然,以便将来能给我们的子孙后代留下一些东西。
Then see which plants grow higher, measure them with a ruler and write down your results.
过后看看哪种西红柿长得比较高,用尺子量量并记录下你的实验结果。