They studied the sun's movement and also paid attention to other natural changes such as air temperature, water and plantgrowth.
他们研究了太阳的运动，还关注了其他自然变化，如气温、水和植物生长。
2
Saline soils, which have high concentrations of sodium chloride and other salts, limit plantgrowth, and research continues to focus on developing salt-tolerant varieties of agricultural crops.
盐碱地含有高浓度的氯化钠和其他盐类，限制了植物的生长，研究继续集中于开发耐盐的农作物品种。
3
Red light has been known to accelerate plantgrowth.