Alternating series
[机] 交错级数定理
🧩 词语组成解析
a. 交互的\\n[医] 交替的
🗣️ 情景例句
Hello.
您好。
That's fine. What time do I have to be at the airport?
好的。我应该几时到达机场？
The guards couldn't have been watchig very carefully.
警卫不可能一直认真地查看。