And so I went through the math on this and said suppose I wanted to be really sloppy and I wanted to say if the delta X, the uncertainty in position is on the order of one angstrom.

我算完它,并说假如我想很草率,并且我想说如果x的增量，即位置的不确定度,相当于一埃。

麻省理工公开课 - 固态化学导论课程节选

"When my father said they were not in a position to order that day, the salesman lost interest and left, leaving my parents feeling flustered and annoyed that they had been targeted by a company which was using their mobility problems as a sales tool, " said their son, who did not want to be named.

BBC: Mobility aid sales scam warning

Further, the fund tends to remain in mining stocks even if the sector as a whole turns lower, although it might increase its cash position some in order to take advantage of shares that might become cheap.

FORBES: USAGX's Denbow Looks For Gold Stocks 'That Will Survive In Most Markets'

In many bird species feather colour and position in the pecking order are closely correlated.

ECONOMIST: Male birds cannot afford to relax their standards