第一

第一

"第一" means "first" or "number one."

Here, '第一' denotes the ordinal number 'first,' indicating the position in sequence.

他是第一个到达的人。

He is the first person to arrive.

In this case, '第一' is used to emphasize priority or importance, equivalent to saying 'primary' or 'foremost.'

安全是我们的第一要务。

Safety is our top priority.

In this sentence, '第一' refers to the best ranking or position in a competitive setting.

在比赛中，他得了第一名。

In the competition, he achieved first place.