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
And without their energy and stamina,
没有他们的体力和耐力，
He's not in. May I take a message for him?
他不在，我能替他捎个口信吗？
One is the general atmosphere of secrecy in which it is carried out,
一是科研工作中普遍存在的保密气氛；