Present a difficulty
引起困难
🧩 词语组成解析
🗣️ 情景例句
I found it.
我发现了它。
If at first you don't succeed, try, try again.
初试不成功，努力勿懈怠。
He has been able to tell us more about active volcanoes than any man alive.
他能告诉我们的有关活火山的情况比任何在世的人都要多。