That was an unreasonably long scan time and in the case of CT entailed very high exposure to radiation.

那时候扫描时间十分漫长，而且在CT检查时高暴露于放射线。

youdao

A typical core is several metres long, so it is first subject to a rough and ready ct scan using a standard medical scanner.

典型的岩石核有几米长，因此首先要采用标准医学扫描仪对其进行粗略的CT扫描。

youdao

I speak quite often to groups of 10-20 people in Toastmasters. When I use this technique to make eye contact as I scan the room, I pause just long enough to build rapport with each audience member.

我十分经常在10到20人的群体中担当主持人，当我借环视整个房间时用这个方法和观众进行目光接触，直到和每位观众建立足够融洽的关系才停止。

youdao

Meanwhile, mission specialist Charlie Camarda and pilot Jim Kelly have been continuing to inspect the shuttle for damage sustained during the climb to orbit, using the shuttle's 15m-long boom to photograph and scan Discovery's port wing.

BBC: The two astronauts spent nearly seven hours on the outside

Bartley will have a scan to determine how long he must spend out of action, but it could be as much as six weeks.

BBC: Rangers' Kyle Bartley misses cup final with knee injury

Founder Ali Stunt said that 80% of patients in Britain are not eligible for surgery at diagnosis because GPs do not recognise the symptoms, and it takes too long for patients to have a scan.

BBC: Radical surgery 'has kept me alive' says cancer sufferer