Retention aid
[化] 助留剂
🧩 词语组成解析
retention
[ri'tenʃən]
n. 保留;记忆力，保持力;滞留，扣留;闭尿;
aid
[eid]
n. 帮助;助手;外援;辅助设备;
vt. 帮助;资助;救助;促进;
vi. 帮助;
🗣️ 情景例句
I need some help.
我需要帮助。
Many receive advice only the wise profit by it.
聆忠言者众，智者独获益。
Please make sure you mark the shipment for careful handling.
请不要忘了在货物上标明“小心搬运”。