A storage dam
蓄水闸
🧩 词语组成解析
dam
[dæm]
n. 水坝，堰;水库;（牙科用的）橡皮障;〈比喻〉障碍;
vt. 用水坝阻止;阻塞，抑制;
🗣️ 情景例句
It's still raining. I want to play tennis.
仍然在下雨。我想打网球。
Doris would like to see your pictures of California and so would I.
多瑞丝喜欢看你加利福利亚的照片，我也一样。
Then knowledge began to be accumulated according to a systematic plan.
于是，知识便开始有系统有计划地积累起来。