You would be delighted to know that since 1990 we have been one of the main importers of raw materials for plastic manufacturers.

You would be delighted to know that since 1990 we have been one of the main importers of raw materials for plastic manufacturers.

想必贵公司会欣于得知，自1990年以来，我们一直是塑料制造商的主要原材料进口商之一。