the days of the week
宇宙线通量２７天重现性
27 days recurrence of cosmic-ray flux【地物】
暂无补充释义。
相关词条
draft at...days sight
number of days sales in receivable
for the past few days
number of days sale in inventory
dog days【气候】
running or consecutive days
serviceable vehicle-days【公路】;well-conditioned vehicle-days【公路】