Results: the variation of tooth position gave no effects to the directions of principle stress around apex area in symmetrical occlusal type.

结果：在对称性咬合，牙位的变化对各牙的根尖主应力方向无影响。

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Conclusions: 1 the stress is concentrated in alveolar bone crest and apex area of the maxillary anterior teeth while they are in tipping movement.

结论：1倾斜移动内收上颌组牙时，各个牙的牙槽嵴顶部和根尖部都有明显的应力集中区域。

youdao

The general antennal structures are commonly seen within other chalcid wasps except for a specialized 'explore area' on the ventral apex of female antenna.

平腹小蜂的触角除了雌蜂触角末端腹面具有特化的斜截“探索区”以外，大体特征基本和其它小蜂相似。

youdao

Many cetaceans are among the apex predator species first to go from an area if things are not right, so if we can protect whales and dolphins, we know we are on the right road.

BBC: Saving the seas for marine mammals