Upstream

['ʌpstriːm] or [,ʌp'strim]

解释:

(adj.) in the direction against a stream's current .

艾琳校对--From WordNet

解释:

(adv.) Toward the higher part of a stream; against the current.

奥尔登录入

解释:

adv. towards the upper part of a stream.—v.i. Upstream′ to stream up.

录入:威廉姆斯