虽然很难辨别哪些包裹里装的是社会保障支票等重要物品，但美国邮政（USPS）和联合包裹服务公司（UPS）会尽其所能优先处理敏感材料。
It can be hard to identify which parcels are carrying crucial items such as Social Security checks, but USPS and UPS try their best to prioritize sensitive material.
但如果我们想要使我们的移民系统运作，我们就得做好准备，实诚地，无所忌讳地讨论这些重要且敏感地问题。
But if we are going to make our immigration system work, then we have to be prepared to talk honestly and without fear about these important and sensitive issues.
发现煤种影响虽不如煤直接液化那样敏感，但选择合适煤种仍是重要的。
It was found that the influence of coal samples is not so sensitive for co-processing as for coal direct liquefaction, but a careful selection of coal feedstock is still important.
应用推荐