I agree with Bob. I think we should have a picture of the computer and give a description of the product.
我同意鲍勃的意见。我认为我们该拍一张计算机的照片,并作产品说明。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%,它就要燃烧。
It soon became clear that the straight part of the dance changed when the sun's position changed. If the feeding place was toward the sun, the dancer headed straight upward during the straight part of the wagging dance.