托福口语模板:植物种子延迟发芽

Task 4:
　　Bet hedging 一些植物生活在天气气候多变的环境，如果植物出来的种子一次性全部发芽的话，可能会由于干旱会导致全部死亡。于是有些植物就把部分种子延迟 a year or more 再发芽。
　　Listening：
　　美国西部的沙漠中，有一种植物叫pepper grass, 如果生出种子的那一年没有雨， 一部分种子就会随风飘落，然后sprout一部分, 第一年不继续生长，等到第二或者第三年有水了以后再发芽，或者等不到雨季dry out。
　　托福口语模板及托福口语参考答案范文:
　　托福口语范文:
　　参考答案：
　　Some plants live in a harsh climate. If all of their seeds sprout, they might all dry up and die, so some plants would save part of their seeds for the next year, which is called Bet hedging. There is a kind of plant specie called pepper grass. Pepper grass lives in the desert where there is not enough water for all the plants. In order to survive in this harsh environment, pepper grass has developed adaptation to deal with it. It would produce as many seeds as possible, but only sprout part of the seeds, leaving the rest as remain. When there is enough water or rain, the seeds that sprout will grow into maturity, but if there is no luck, not enough water for the plants, the seeds would die dry out, the rest part of the seeds, which didn’t sprout will wait until the next rainfall to grow.英语口语