请高手进来帮忙翻译一下。

To be fair, your company should provide the certificate first before requesting us to provide ours.
Since we have already sent you LOI as requested, by standard trade practice, you should respond with FCO as soon as possible. It's not a certificate that can ensure a smooth transaction, rather it takes sulfur and American dollars. You can ship the order after receiving our letter of credit, so there's no issue of uncollectible payments for you.

We are running low on sulfur currently. If you are unable
to provide the requested quantity, please let me know as soon as possible.

上网翻译的不好吗？以下见爱词霸：
Asking us to provide a certificate of registration before, you should first provide the only reasonable. We have provided on request LOI, in accordance with international trade practices, you should be back as soon as possible FCO. Will enable the smooth conduct of trade is the sulfur and the U.S. dollar, rather than a certificate. Trade procedures, guess