to use a needle and syringe (= small tube) to put a liquid such as a drug into a person's body注射;給…注射
to introduce something new that is necessary or helpful to a situation or process投入;增添;引入,帶來
👨🏻🏫 Mr. Ng 劍橋詞典 📚 – cambridge.mister5️⃣.net切换为简体中文