C1 Insecure people have little confidence and are uncertain about their own abilities or if other people really like them.无把握的;不自信的
C2 (of objects or situations) not safe or not protected(物体)不牢固的,不安全的;(局势)无保障的,不稳定的
👨🏻🏫 Mr. Ng 劍橋詞典 📚 – cambridge.mister5️⃣.net
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