Does "than" introduce a potential ambiguity? [closed]
It is ambiguous, probably out of negligence. Some people do address others as if the others knew everything they know. Also, the context may be so unambiguous that it could make up for the ambiguity of this sentence. But one simple word could solve it. Either:
The continent does more trade with China than the US does. (the comparison refers to the trade the continent and the US do with China)
or
The continent does more trade with China than with the US. (the comparison refers to the trade the continent does with China and with the US)