Eustele
n. [植]真中柱( 存在于大多数裸子植物和被子植物的茎内)
🗣️ 情景例句
As a matter of fact,
事实上，
What's the suggested retail price?
建议零售价格是多少呢？
They covered 120 miles in a single night.
他们仅一夜就走了120英里路。