The glass is then etched down to the inner layer leaving the design outline in relief. fine cameo glass was produced by the Romans in the1st century AD.

然后将外层玻璃蚀刻到内层，使设计的轮廓成为浮雕，其精细部分用手工或旋转的刀具雕刻。早在公元1世纪，罗马人已生产出精美的宝石玻璃品。

youdao

The painful pump in current town is an ache to used for after operation, bring trouble relief or alleviate sufferer but design of.

现有的镇痛泵是用于手术后，为患者解除或者减轻患者的疼痛而设计的。

youdao

Conceptual design of pressure relief systems is an important stage in the design of a safe process plant.

压力泄放系统的方案设计对石油化工厂中的安全生产是至关重要的。

youdao

Other groups are certainly involved in the relief effort, and are mobilising through social media and the web - among them Rockaway Relief, which describes its members as "local New Yorkers working in tech, design, fashion, restaurant, entertainment and hospitality".

BBC: Occupy Sandy: From protest group to storm recovery