plant growth的用法和樣例：
例句
- Magnesium is the nutrient element in plant growth.
鎂是植物生長的營養要素。 - "A-bomb, H-bomb and nuclear-powered submarine"
兩彈一艇 - Farmers burn the field to encourage new plant growth.
農民們為了促進作物生長，焚燒土地。 - Azotobacter and Azospirillum also have plant growth regulation activity besides fixing N2.
固氮菌和固氮螺菌除固氮之外，也有調控作物生長的作用。
