三十分钟的

The floating gates, which have a hollow cavity inside, work according to Archimedes' principle of buoyancy. When compressed air is pumped in, emptying the gates of water, the buoyancy of the giant panels will be greater than their weight, and in just 30 minutes the barrier will float above the surface. The gates are attached to the seabed with hinges, which are designed to absorb the force of waves and keep the barrier in place. The gates will only be raised when waves are higher than 1.1 meters, to reduce interruption of the sea currents to a minimum.

这些中空的水闸门，主要依照阿基米德浮力原理操作，当闸门内注入高压空气排水后，闸门受到的浮力大於闸门重量，只要三十分钟就能浮出水面，闸门底部则用轴承固定在海底，再透过细部结构设计能够悉受波动力量，保持闸门的稳定性，而水闸门只有在浪高超过110公分的时候才会升起，把对海水交换的干扰降到最低，其他维护潟湖生态的措施也获得欧盟肯定，所以在2009年4月，取消摩西工程违反自然保育法的决议。

Directors also ignore the complaints about moviegoing--the glop on the floor, the indifferent projection, the half an hour of ads and in the row behind you a nattering couple rehearsing their Jerry Springer act.

导演们同时也忽视上电影院会有的抱怨–地板有不明湿黏物，差劲的播映技术，电影有三十分钟在播广告，坐在你后排的观众不停模仿著「杰瑞开炮」的桥段。

But nearby Cabot, his partner in the award-winning Cabot Clothbound Cheddar, offers a 30-minute guided tour complete with movie .

但不远处有与他合力生产获奖的盖伯特裹布切达乳酪的盖伯特厂，提供包含电影介绍的三十分钟导览行程。

I am trading in GBP/JPY and other currencies using this Simple method for quite sometime now and its proven to be successful 90% of the times, the only times it has failed is when a spike up or down during news time, so i discourage anyone to stop using this 30 mins prior and after the news to escape from the whipsaws.

大家好，我用这个简单的方法交易磅/日和其他的货币相当长的时间了，这个系统被证实90%的时候是正确的。这个系统位于不适用的地方是在有重大消息导致汇价波动出现常常的毛刺的时候。因此我我建议大家在重大消息出来的前后三十分钟不要交易。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐