4.Yes, that's right. When a boxer is knocked down, he has ten seconds to stand up and get his senses together – if he can't, there's a good chance he's concussed.
5.And if you want to grow your brain power, not get linguistically concussed, why not join us again soon for more topical discussion and useful vocabulary here at 6 Minute English from BBC Learning English!
6.Doctors and family members are beginning to testify on the second day of trial in Utah, where Gwyneth Paltrow is accused of crashing into a skier at Deer Valley Resort, leaving him concussed and with four broken ribs.
7.I studied trigonometry for a month. I sometimes dreamed about sine, cosine and tangent, about mysterious angles and concussed computations, but for all this I made no real progress. I could not self-teach trigonometry. But I knew someone who had.