Poured concrete retains walls work well in the heavy or unstable soil and steep slopes, making other walls inadvisable.

在重质或不稳定的土壤和陡峭的斜坡上，浇注混凝土挡土墙效果良好，让其他墙成为不明智的选择。

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Poured concrete retaining walls work well where heavy or unstable soil and steep slopes make other walls inadvisable.

现浇混凝土挡土墙以及在繁重的工作或不稳定的土壤和陡坡作出其他墙壁不明智的。

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In testing the stability of Linux kernel releases, there is a need to clearly state and document why the release is stable or unstable.

在对Linux内核版本稳定性的测试中，需要明确地声明并证明为什么版本是稳定的或者是不稳定的。

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The organisation is trying to rally interest, stressing that it does not send people to dangerous or unstable countries (it has pulled out of Zimbabwe and Pakistan, and has never worked in Yemen, where three American medical missionaries were murdered last month).

ECONOMIST: Volunteering

In the 4, 162-person PROVEIT study, Harvard cardiologists found that patients hospitalized for heart attacks or unstable angina who took a 80-milligram dose of Lipitor were 16% less likely to suffer heart attacks or other cardiovascular "events" over two years than those who took a lower dose of Bristol-Myers Squibb 's (nyse: BMY - news - people ) Pravachol.

FORBES: Cost Of Saving A Life Gets Higher

Plenty of bugs just cause the software to act flaky or become unstable or hang without offering an attacker any inroads into the machine.

FORBES: How Bad Assumptions Are Making Software Less Secure