| 例句 |
They actually monitor the movement of the fish going up river.他们实际上在监测鱼类迁往上游的活动。The barriers are lethal to fish trying to swim upstream.这些障碍物对于想要往上游游动的鱼儿来说是致命的。They monitor the movement of the fish going up river.他们在监测鱼类迁往上游的活动。He struggled to swim against the flow of the water.他逆着水流拼命地往上游。When you swim up stream, you have to stem the current.当你往上游游的时候，你得顶著水流而上。 |