英语是：Number One in the world.
例句：她保住了自己世界第一的排名。
She has retained her No.1 world ranking.
扩展资料
到2020年，它将成为世界第一，预计每年将接待1.3亿游客。
By 2020, it will be top, with predictions of 130 million visitors per year.
美国仍旧是世界第一制造大国。
America remains the worlds largest manufacturer.
