硒和铝在生物中含量其微.Selenium and aluminum are found in vanishingly small concentrations within living things.除了硒和汽相沉积的锗和硅之外, 玻璃至少是二原子的.Apart from selenium and vapour - deposited germanium and silicon, glasses are at least diatom...
They've set off for the long trudge home.他们出发了,长途步行回家.He wished he was not in a room so far from the bathroom. There was nothing for it but a long trudge through the house.他真希望自己的房间离卫生间不那么远，没别的办法，只能走上长长的一段穿过屋子。It wa...