免费专业英语词汇下载 ... 离子交换分离 separation，ion-exchange 异构物分离 separation，isomer 同位素分离 separation，isotope ...
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由于地处偏僻，纳瓦霍人还得以在同西班牙以及美国定居者做交易的同时保留自己相对的独立性，亚瑟和戴蒙德写道。
That remoteness also allowed them to remain relatively independent while trading with Spanish and American settlers, Arthur and Diamond argue.
由于交易的独立性，强调“总是即时、精确”风格的系统很难扩展。
Systems that enforce an "always accurate, right now" paradigm are difficult to scale because of their dependence on transactions.
然而，二人均补充称，推出独立音乐视频服务的交易不会取代与YouTube的现有交易。
Both added, however, that any such deal to create a standalone music video service would not replace existing deals with YouTube.
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