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小测验：选择正确的单词
- 论坛新贴
upstream ['ʌp'stri:m]
基本释义
- ad. 向上游,逆流地
a. 向上游的,逆流而上的
英英解释
1个副词解释
- toward the source or against the current
[同] upriver, upstream
[反] downriver, downstream
1个形容词解释
- in the direction against a stream's current
[反] downstream
- toward the source or against the current