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。

youdao

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》

If, thereafter, their subcontracts are for some reason reduced, such firms can face potentially crippling fixed expenses.

如果此后，他们的分包合同由于某种原因被削减，这些公司可能会面临潜在的严重的固定支出。

youdao

He fixed his face, dumped his wife and child, and plunged back into politics.

ECONOMIST: Brazilian politics: The fun stops here | The

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