The rules of movement and energy dissipation are surveyed with a single freedom degree system striking the fixed face in this paper.

研究了不考虑阻尼情况下，单自由度系统与固定面多次碰撞后的运动规律和能量损失情况。

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I had to go through the rest of the evening with a fixed smile on my face.

我不得不带着一脸僵硬的笑容度过那晚余下的时间。

《柯林斯英汉双解大词典》

Colin looked fretful and kept his strange black-lashed eyes fixed on Dr. Craven's face.

科林显得很烦躁，黑睫毛下的那双奇怪的眼睛一直盯着克雷文医生的脸。

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Otherwise oncologists, who face important fixed expenditures in the short run, might be forced to make some very unfortunate decisions.

FORBES: Will the Sequester Cause Oncologists to Lose Money Prescribing Chemotherapy?

So drivers caught tailgating, braking suddenly, or passing a vehicle on the nearside might face a fixed penalty notice in future, like many speeders today.

BBC: Fixed Penalty Notice motoring fines may rise to ?90

Teams who exceed the limit - which does not cover some expenses such as driver salaries, fines, and marketing - do not face any fixed penalties, but will have their fate decided by the FIA depending on the degree of their overspend.

BBC: F1 'can survive without Ferrari'