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
Sure. Where are you going?
当然。您要去哪里？
Praise is not pudding.
恭维不是布丁。
During the journey, their boat began to sink.
途中，船开始下沉，