We tested it last week on twelve- to fifteen-year-olds,
我们上一周曾在十二岁至十五岁的孩子中试过这项游戏,
To hear a hundred times is not so good as to see once.
百闻不如一见。
A burst of activity associated with the laying of submarine cables soon confirmed the Challenger's observation that many parts of the ocean were two to three miles deep,