I'm sorry to say this, but there seems to be a mistake.
对不起,这儿好像有个错。
We must have your LC at least one month before the time of shipment.
我们必须在船运前一个月收到你们的信用证。
Professor Karl von Frisch, an Austrian scientist, spent many years of his life researching the amazing ways honey bees communicate in their dark hives.