Soon after the upgrades, Hubble took aim at a dark patch of sky, gathering infrared light for a total of four days to detect the very faintest objects.

更新后不久，哈勃便把目标锁定太空的一处黑暗区。在连续收集了四天红外光后，哈勃发现了极其微弱的物体。

youdao

If the buy does not make the fully payment in four days (including due date), the buy must pay a late fee of 0.005% on overdue total amount in a daily basis to the supplier.

买方应从买价付款期限届满后的第四个工作日起（包括该日）按照每日万分之五的比例就未及时支付的款项向卖方支付滞纳金。

youdao

The committee held a total of four days of hearings.

CNN: Transcript: White House Counsel Ruff's opening statement

She conceded that suction to Mr Ridd's lungs, which doctors had said should have happened every two to four hours, occurred only three times in total during a stay of nearly three days in the ward.

BBC: Paul Ridd inquest: NHS neglect 'contributed to death'

"It takes four of us about six days in total, so it's a long job but worth it in the end, " she said.

BBC: Suffolk houses shine with Christmas lights for charity