why is the probiem of payment rather complicated in foreign trade?

why is the probiem of payment rather complicated in foreign trade? the probiem is common in all developed countries,怎么翻译》? Why is the-letter A like twelve o'clock?quick Why is the letter A like twelve o'clock 意思 Why is the letter A like twelve o'clock? Why is the letter A like 12 o'clock? why is the letter O like a pain? Why is the letter O like a pain? The probiem is so difficult that nobaby in our class can work it out的同义句 Why is the letter A like 12 o'clock Because it is in the middle of ( ). Why the answer is the reson.why..is 英语翻译brush her teeth,and then hei mom would read a story to her.the probiem is,jasmine liked to take really long baths.every night hei mom would say,“jasmine,it's time to get out the bath.and every night jasmine would say ,''okay,mom,just o 连词组句：more,eat,the,the,fatter,you,become,you _______________________________.还有一个：the,held,will,meeting,be,whether,or,is,a probiem,not__________________________________________. Promise is eternal.Why don't we treasure the chance that we can meet each o If each letter stands for different number.Can you work out the maths probiem?P O T A T O+T O M A T OS A L A D S Why is the river rich? why the sky is blue?