5 burst out 突然发生，突然---起来 6 just under a year ago 就在不到一年前 7 knock over （开车）撞伤，撞死 knock out 使入睡;使不省人事 knock sb out of sth 把某人淘汰出局 knock into/against 撞上 .
Justunderayearago, he appeared at a public lecture in a wheelchair to announce that he was suffering from a variant of motor-neurone disease, in which the body succumbs to inexorable paralysis: like being imprisoned in a shrinking cell, he said.