External indicator
[化] 外指示剂; 外用指示剂
🧩 词语组成解析
external
[ɪk'stɝnl]
adj. 外面的，外部的;表面上的;外用的;外国的;
n. 外部，外面;外观;外部情况;
exter出去+nal=al...的 → 出去的 →在外面的 →外部的
indicator
['ɪndɪketɚ]
n. 指示器;[化]指示剂;指示者;
🗣️ 情景例句
but we have to get going
但我们必须走了，
I ate tomato soup for lunch yesterday.
我昨天晚饭吃的是番茄汤。
Last week, my four-year-old daughter, Sally, was invited to a children's party.
上周，我4岁的女儿萨莉被邀请去参加一个儿童聚会。