But rescue missions don't always go to plan. 但救援任务有时也会偏离轨迹
But, of course, they're balancing that against the fact 但如果不尝试救援
but a part of me is always very worried. 但我总是会有些担心
But in order to tag, she will first need a successful rescue. 但为了能够标记河豚 必须先有河豚得到救援
there's a little bit of anxiety, but if they work, 虽然有点担心 但如果运行顺利
..but at a cost to the natural world. 但这是以自然世界的损害为代价的
But today, two thirds of our world's great rivers 然而今天 世界上三分之二的大江大河
..but these strange patterns are channels of freshwater... 但这些奇异的图案实际上是通往海洋的