周期: period; cycle; circle; revolution; round; complete alternation 短语和例子产业周期 industrial cycle; 经济周期 economic cycle; 商业周期 business cycle; trade cycle; 生产周期 production cycle; 再生产周期 cycle of repr
Example Sentences:
1.
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。
