下向贸易

下的英语翻译：

below; descend; down; give birth to; give in; go to; leave off; lower; next
take
【医】 cata-; hyp-; infra-; kat-; sub-

向的英语翻译：

always; at; be partial to; direction; face; out; to; toward
【医】 ad-; ak-; ob-

贸易的英语翻译：

commerce; trade; traffic
【经】 commerce; commercial act; commercial transaction; deal