slightly hot

Although very hot, prominences typically appear dark when viewed against the Sun, since they are slightly cooler than the surface.

虽然很热，日珥典型表现是在太阳的衬托下显得较暗，因为它们比太阳表面稍冷一些。

The telescopes sift through the background cosmic radiation to find spots where it has been slightly perturbed as it passes through extremely hot gas, a hallmark characteristic of galaxy clusters.

南极天文台三大观测宇宙的天文台之一，旨在检测由宇宙大爆炸而产生的大量存在于微光辐射中的扭曲现象，利用天文望远镜对宇宙射线背景进行筛选，再利用星系群的特点确定一个点，即当宇宙射线穿过极热气体时会产生轻微混乱，混乱的那一刻就是所要找的那个点。

The Chukchi boy was suddenly burnt by a red-hot thing. So the child obviously became aware of every rustle around him and jumped aside every time he was slightly touched.

楚克其族人的孩子会突然被烧的红通通的东西烫，这样这些孩子明显就会知道每次跳开这些烫的东西，甚至是当它们轻轻的碰到他们的时候。