例句與造句

1. Those figures are simple compared to calculating the proper lifetime of a TV series.
2. N is the number of muons measured in the upper atmosphere, M at sea level, Z is the travel time in the rest frame of the Earth by which the muons traverse the distance between those regions, and T _ 0 is the mean proper lifetime of the muons:
3. It's difficult to find proper lifetime in a sentence. 用proper lifetime造句挺難的