look into =investigate调查
hold sb responsible for sth负责
comple=force迫使
lose no time in doing sth立即做某事
it is imperative that重要
stock库存
to our regret 令我们遗憾的是
needless to say 不用手
telex 电传 telegraph=cable 电报 fax传真
complaint about sth 申诉
delay in sth延误
make/file/raise a claim索赔
