There are several factors that can influence sonic booms -- weight, size, and shape of the aircraft or vehicle, plus its altitude, attitude and flight path, and weather or atmospheric conditions.

有几个因素可以影响音爆——飞行器的重量，大小，形状以及其飞行高度，姿势和路线，还有天气或大气状况。

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Factors that influence energy intake include portion size, energy density and the number of meals, snacks and drinks consumed each day.

影响能量摄取的因素包括：份量大小、能量密度、用餐次数及每日消耗的小吃和饮料。

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And the morphology and size of particles are important factors to influence their performance.

而粒子的颗粒形貌和尺寸是影响其使用性能的一个重要因素。

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Although high-volume units treated the sickest infants and had highest crude death rates, when the statistics were adjusted for factors such as the severity of the illness, patient volume and staffing provision, unit size did not influence death or brain damage rates.

BBC: 'Baby death risk' of busy units