He planned to climb it without oxygen tank, something only a few climbers had managed to do.
他计划在没有氧气罐的情况下攀登，只有少数登山者做到了这一点。
2
Minimize the amount of water your toilet uses with each flush by putting a plastic bottle (a large pop bottle will do fine) filled with sand or gravel in the toilet tank.
想减少冲马桶时的用水量，你可以把一个装满沙子或小石子的塑料瓶（汽水瓶也可以），放在水箱里。
3
He has set up something that might be called a think-tank but would better be termed a "do-tank". An early project is to produce a league table of Polish courts according to their websites.