Oncolite
藻灰结核; 核形石
🗣️ 情景例句
People are busy shopping and wrapping presents for relatives and friends before Christmas Eve.
在圣诞节前夜，人们忙着为亲朋好友买东西、包礼物。
From across the room, David cast a glance at his brother.
隔着房间，大卫瞥了一下弟弟。
Yes, you're right.
对，你说得对。