That was an unreasonably longscan 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。
2
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。
3
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.