But allowing autonomous commercial drones to deliver customers' parcels in cities would cross a perception threshold.
但允许自动商用无人机在城市递送客户包裹将跨越一个认知门槛。
Objective To develope a new instrument with a pressure sensitive strain gauge for measuring the pain perception threshold of oral mucosa.
目的研制电阻应变式口腔黏膜压力测痛仪，并对正常年轻人的牙龈黏膜疼痛阈进行测试。
Linear correlation analysis showed that the gastric perception threshold decreased in concordance with the increase of degranulation of 5-ht-positive cells.
直线相关分析显示，5 - HT阳性细胞释放介质越多，胃感知阈值越低。
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