The coastal boundary condition is commonly set to be the mean sea level in existing models of regional coastal groundwater flow, neglecting the influence of tides.

在现有的沿海区域地下水模拟中往往将海岸边界条件定为平均海平面高度，忽略潮汐的影响。

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The conducting mode of the proposed DCDC converter is different from any existing DCDC converters, so the boundary conditions of the proposed converter are analyzed in detail.

由于它的导电模式不同于任何现有的变换器，因此本文对这种变换器的临界条件进行了详细分析。

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They can be used to replace existing open bearings since they have the same boundary dimensions.

这种轴承可用于替换现有的开放式轴承，因为外形尺寸相同。

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Airport operator, London Luton Airport Operations Limited said the expansion would be carried out in three phases within the existing boundary up until 2028.

BBC: Say No to Luton Expansion

Operator London Luton Airport Operations Limited (LLAOL) said up to 5, 100 jobs would be created by the expansion, which would be carried out within the airport's current boundary and using its existing runway.

BBC: Luton Airport expansion: 65% back plans in consultation

The Local Government Boundary Commission for England (LGBCE) plans to abolish existing wards in 10 parishes across Cumbria and redistribute them.

BBC: Motion of regret