S. o. s.
[医] 必要时
🧩 词语组成解析
[医] O型, 菌体型, 不动型(细菌)
🗣️ 情景例句
No, not yet. What about you?
不， 还没有。你呢？
The comet will appear in the southern sky.
彗星出现在南方的天空。
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。