This can cause problems for those users with unconventional or new postal addresses because no list is returned for their postcode, or their particular address is not present in the list.

这对于哪些非正式的或者新的地址可能会有问题， 因为这种情况下不会为用户返回邮编。

youdao

You will need to know the full address and postcode (which is called a PIN code in India) for your hotel.

你还得知道所要送到的旅馆的具体地址及邮政编码(在印度叫做PIN编码)。

youdao

For example, some ecommerce websites force users to undertake a postcode look up when entering an address.

比如；一些电子商务网站，当用户输入地址的时候，自动帮助用户查找邮编。

youdao