trade用什麼介詞

用介詞in，例如：

1、Richard refused to trade in his old Canon cameras.理查德拒絕用他的舊佳能相機以舊換新。

2、They do a lively trade in souvenirs and gifts.他們做紀念品和禮品生意，做得有聲有色。

3、The illegal trade in animal products continues to flourish.野生動物製品的非法交易仍舊猖獗。