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
They're so thoughtful.
他们真周到。
I feel the same way.
我有同感。
How are you getting on with your English lessons?
你的英语课学得怎么样了？