The l I ttl e boy behaved wi th great courage I n the face of the gunman .
在持枪歹徒面前这小男孩表现得极有勇气。
" Back in the 70s when I first got involved in computers and electronics , ttl chips were what people used , so that 's what I turned to , " said mr buzbee .
Ttl stands for time to live . It 's a number of minutes that indicates how long a channel can be cached before refreshing from the source . More info here .
