在过去，当唯一的交通工具是马时，人们在交流、商业和生活中普遍存在许多困难。
In the old days, when the only means of transport were horses, there were many difficulties in communication between people, in commerce, and in life generally.
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commerce英 /ˈkɒmɜːs/|美 /ˈkɑmərs/
解释
commerce 由前缀 com-（表示"共同"）和词根 merce（来自拉丁语 merx，意为"商品"）组成，字面意思是"共同交易商品"，即"商业、贸易"的意思。这个词特指大规模的商品买卖活动。
In the old days, when the only means of transport were horses, there were many difficulties in communication between people, in commerce, and in life generally.
commerce 由前缀 com-（表示"共同"）和词根 merce（来自拉丁语 merx，意为"商品"）组成，字面意思是"共同交易商品"，即"商业、贸易"的意思。这个词特指大规模的商品买卖活动。