目睹困苦、潦倒的景象，他们感到心里极不舒服。They were sickened by the scenes of misery and degradation they found.他们在最困苦时仍处之泰然,连捉住他们的人都深有感触.The philosophy of them during their worst sufferings impressed even their captors.烈火试真金, 困苦练壮士.The fir...
实际上，它是用来将铀浓缩以制造武器。It was actually used for enriching uranium to weapons-grade levels.铀可溶解于海水。Uranium is soluble in sea water.在每1000个铀原子当中,只有七个是铀235.Only 7 uranium atoms of every 1,000 are U - 235....