日周期 meaning in English
daily periodicity
diurnal periodicity
quotidian cycle
Examples
- Just as mercury has a much shorter year than earth ? a mere 88 days ? the material in the inner parts of a disk invariably takes less time to complete one orbit than does material in the outer parts
正如同水星绕日周期（只有88天）较地球短，在圆盘内侧的物质绕行轨道一圈所需的时间，永远比外侧的物质短。