air pore的用法和樣例：
例句
- Oxygen and carbon dioxide from the air enter through the stoma.
氧和二氧化碳從空氣中進(jìn)入氣孔。 - Each stoma is surrounded by two crescent-shaped GUARD CELLS, attached to each other at their ends, which regulate the opening and closing of the pore by changes in their turgidity.
每個(gè)氣孔被兩個(gè)新月形的保衛細胞頭尾相接圍繞而成。
