His mother watched him with an anxious expression on her face.

1、

She has a worried look on her face.

她脸上有焦虑之容.

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2、

The worried look deepened upon her face.

她脸上忧愁的表情加重了.

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3、

There was a worried look on his face.

他脸上有一种担忧的表情.

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4、

His face took on a worried look.

他的脸上带有一种忧伤的神情.

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5、

He seemed very worried.

他好像非常担心。

《柯林斯高阶英汉双解学习词典》

6、

Melamine Decorative doors with advanced hardware and accessories pleasant memory lasting forever.

三聚氰胺饰面门板,加上良好的五金配饰件,经典人生永恒的回忆.

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7、

I am deeply grieved over his death.

对于他的死,我是很悲痛的.

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8、

We are deeply grieved about your misfortune.

对你的不幸我们深表哀悼.

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9、

On hearing the news of his death, I was deeply grieved.

得知他去世的消息, 我催心剖肝.

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10、

They were deeply grieved when they heard the news of their mother's passing away.

听到母亲逝世的消息,他们都悲痛万分.

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11、

Laura was deeply grieved at the news.

劳拉听到消息后十分伤心.

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12、

The lead rail was redesigned to make it more high strength, and the rail working face higher rigidity and higher abrasion performance according to the actual situations.

根据实际情况，重新设计了具有较高强度且工作面具有高硬度和耐磨性的导轨。

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13、

At last, an optical instrument demanding high-precise dimension was measured by the system, which demonstrated that the uncertainty of the measurement system was 1.2 μ m.

最后使用该测量系统对一个有高精度尺寸要求的光学仪器进行测量，重复性精度可达1.2μm。

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14、

Especially, modern spectral estimation is not only of high resolution, but also able to process non stationary time series, so it is widely used.

特别是现代谱估计方法，既有高分辨率，又可以分析非平稳时间序列，具有广泛的应用。

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15、

In order to ensure the quality of the connection, the valves which have high requirements of air tightness must be inspected one by one.

为保证连接质量，对有高气密性要求的阀门需要逐一进行螺纹质量检测。

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16、

The results show that the electrode made from the modified materials have small internal impedance, high charge and discharge capacity and good cycle life.

结果表明，这种材料制备的电极，不仅内阻小，而且有高的充放电容量和好的循环寿命。

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17、

In the second chapter, a portfolio selection model under the constraint of higher moments without transaction cost and the linear approaching method are discussed.

第二章讨论无交易成本的有高阶矩约束的最优投资组合模型及近似的线性转换。

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18、

The steel pipes that are widely used in petroleum, chemical industry and energy industry have not only high strength but also good corrosive resistance.

广泛应用于石油、化工、能源等领域的钢管，除了要有高强度外，还要有良好的耐蚀性。

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19、

The main products are high precision cold-drawn fuel tank, high strength precision cold drawn cylinder tube, precision honing tubes, hydraulic cylinder assembly.

主要产品有高精度冷拔油缸、高强度精密冷拔油缸筒、精密珩磨管、液压油缸总成。

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20、

Ozone-based technology has been applied widely in the drinking water treatment. But it may create a high carcinogenic bromate by-product for human body.

在饮用水深度处理中，采用臭氧化技术后，产生可能对人体有高致癌性的溴酸盐副产物。

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