Phugoid
长週期振动
🗣️ 情景例句
Well, that must be him.
噢，一定是他。
Can you keep an eye on my bag?
帮我看一下包好吗？
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。