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Why do we have useless and painful wisdom teeth?
Wisdom teeth, also known as third molars, are the biggest teeth at the back of our mouth. First molars grow around age six, with second molars popping up around ages 10 to 12. Third molars generally appear between ages 17 and 25. They are called wisdom teeth because they tend to develop during a time when a person is considered to be wiser and more mature.
I didn’t invite Frank, but he just popped up at the party.
我沒有邀請法蘭克來,但他卻突然出現在派對裡。
We tend to take natural resources for granted nowadays.
現今,我們往往將自然資源視為理所當然。
Tell me exactly when the first radio came into existence.
告訴我第一臺收音機到底是何時問世的。