Demonstrativeness
论证性（demonstrative的变体）\\n指示性（demonstrative的变体）
🗣️ 情景例句
What's that?
什么事？
Do i need a reservation to go by ship?
我坐船去需要预订吗？
and should not be put in drinks unless it is known to be safe.
只有知道冰块安全时才能加入饮料。