On a 64-bit system, integral types are converted to 64-bit integral types, and singleprecisionfloatingpoint types are promoted to double precision.
在 64 位系统上，整型被转换成 64 位的整型值，单精度的浮点类型被转换成双精度的浮点类型。
2
Derby provides support for real Numbers in several formats: single-precisionfloating-point, double-precision floating-point, and an exact representation decimal, as presented in Table 2.
Derby对实数提供了多种格式的支持：单精度浮点、双精度浮点以及准确的算术表示，如表2所示。
3
Converts the value of the specified object to an single-precisionfloating-point number, using the specified culture-specific formatting information.