T1d50
[醫] 半數組織感染量
??? 情景例句
Do you like white or colored pearls?
你喜歡白的或彩色的珍珠嗎？
That's amazing! I t sure looks expensive.
真想不到！看上去肯定以為很貴。
We chose a big one. It is almost as tall as the room.
我們選了一棵大的。它幾乎和房間一樣高。