①Adversity can overwhelm the weak, and can also create a strong man. ②Fighting with difficulties in adversity can temper the will, strengthen perseverance and cultivate noble character. ③The reason why pine trees stand proudly under the storm is because they grow up in the fight with the storm and the thunder. ④The flowers in the greenhouse are so delicate that they have never experienced the wind and the frost or the test of rain and snow.