As a rule of thumb you need a litre of paint to every 12 square metres of wall. 根据经验粗算一下,每12平方米墙面需要一升涂料。
As a rule the swine infested with the lungworms carrying the "masked virus" did not develop swine influenza immediately upon infestation with the lungworm. 通常,受到携带了“隐蔽病毒”的肺丝虫侵袭的猪,并不因肺丝虫的侵袭立即发生流感。