On smaller machines, adding disks and controllers may be a challenge and may also require the purchase of an expansion unit.

在较小的机器上，添加磁盘和控制器可能是一个难题，还可能需要购置一个扩展单元。

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The other "unique" feature of the Expansion Unit is that it also requires a separate rechargeable battery for its operation.

延伸基座另一奇特的设计，就是基座本身也同样需要一枚充电池才能运作。

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For the fire accident of electrical fire, first cut off the power supply, to avoid accident expansion and burning accident unit.

对于因电起火的火灾事故，首先要切断供电电源，避免事故的扩大和机组烧毁事故的发生。

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Changes include a new specialist IVF unit and expansion of the urology unit.

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In China, SSS grew 14%, while both the international unit and the U.S. unit saw a 5% expansion.

FORBES: Yum! Brands' Profit Jumps 73% In Q1 Despite China Concerns

The first is that Luton Airport was recently invited to Downing Street to brief the Prime Minister's policy unit on the issue of expansion.

BBC: Justine Greening promises action on air capacity