翻译下面的句子和词组!
1.while air freight can be the most economical and certainly the speediest for certain categories of goods
2.shipping costs are an important factor in a product's price in export marketing
3.by far the most
4.in contrast
5.the nature of specific
6.fresh produce
7.handle large shipments
8.overland transportation
9.it is evident that
全部翻译成中文 谢谢!