弗兰克的身体已经被一场严重的心脏病拖垮了。Frank had been struck down by a massive heart attack.是这场高烧把他的身体拖垮的.It's the high fever that's been dragging him down.她的身体被疾病拖垮了.She was pulled down by her illness....
Snails and octopuses are molluscs.蜗牛和章鱼是软体动物.Limpets, snails and octopuses are mollusks.帽贝 、 蜗牛和章鱼都是软体动物.Octopuses vary greatly in size the smallest about 5 cm long.章鱼大小差异极为显著,最小的只有5厘米长....