One difficulty with direct methods is that the designer spends a great deal of time focusing on the velocity distribution; the geometry is secondary.

一个直接的方法就是难度设计者花费大量的时间专注于速度分布；几何为辅。

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Comparing with other kinds of focusing methods, it has a lot of merits: a deeper focal length, a greater ultrasound intensity and an ideal focal region and all of them are easily controlled.

与其他聚焦方式相比，多元组合聚焦超声换能器具有较大的聚焦深度、较理想的焦域以及较高的声强度等优点，并且聚焦区域和声强度易于控制。

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However, most of those nonlinear methods are focusing on the rule of stock data, and the influence of psychological factors is seldom considered.

然而，目前的这些非线性方法多数仅仅就股票数据运行规律进行研究，很少考虑投资者的心理因素对股价运行规律的影响。

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During the seminar there were some issues discussed of further development and international cooperation focusing on strengthening of scientific-research hydrology potential with application of up-to-date methods of study.

UNESCO: OFFICE IN TASHKENT

But he said after reconsidering the idea and focusing on specific engineering issues, including the size of the spacecraft, and long-term propulsion methods, it was considered by the team to be potentially feasible.

BBC: British plan to tackle asteroids