The number is in seconds but may be a floating point value.

刷新时间的单位为秒，但可能是浮点值。

youdao

Reads the current element value as a single-precision floating-point number.

将当前元素值作为单精度浮点数读取。

youdao

Reads the current element value as a single-precision floating-point number.

将当前元素值作为单精度浮点数读取。

youdao