Ad extremum
[医]直到有效
🧩 词语组成解析
ad
[æd]
n. 广告;网球中的优势分advantage. ad in;
n. 极值
🗣️ 情景例句
Thank you.
谢谢 。
Do you mind my smoking?
你介意我抽烟吗？
After entering the narrow gap on the plateau, they climbed down the steep sides of the cave until they came to narrow corridor.
他们从高原上的窄缝进去，顺着笔直陡峭的洞壁往下爬。来到一条狭窄的走廊上。