Nuclei with closed-shell have spherical symmetries.

闭壳核具有球对称性。

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Modal shells, which are most often used for dialogs, prevent the parent GUI (if any) from proceeding until the child shell is closed.

模态shell常常用于对话框，防止父gui(如果有的话)在关闭子shell之前被处理。

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One gets a contribution from an electron outside closed shells and also a possible contribution coming from an incomplete shell or a hole in a closed shell.

化学键的形成来源于一个满壳层之外的电子，也有可能是形成于一个不完全的壳层或满壳层上的一个电子空穴。

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He said that when Shell closed part of one pipeline for repairs, thieves promptly attacked it elsewhere.

NPR: Shell CEO Voser To Retire In 2014

Shell's share price closed down 2.31% as investors were disappointed.

BBC: Royal Dutch Shell profits hit by oil price volatility

Adopting open source software would be more convenient for patients, since it would allow them to access their medical records from anywhere, and it would be less costly for hospitals and doctors who shell out lots of money to buy closed, proprietary software.

FORBES: Google's Eric Schmidt Says Open Source Could Be The Way To Go In Health IT