| 词汇 | manhole |
| 释义 | manhole noun[ C ] uk /ˈmæn.həʊl/ us /ˈmæn.hoʊl/ a covered opening in a road that a worker can enter in order to reach underground pipes, wires, or drains that need to be examined or repaired: （地下管线或下水道供人出入检修的）人孔，检修孔，检查井 a manhole cover检查井井盖 Peter Baker/GettyImages Road surfaces & features asphalt asphalting bike lane bitumen black spot cycle lane cycle track double yellow line dropped kerb fast lane paver paving stone potholed pull someone in ramp tarmac tight turn traffic island unploughed verge manhole | American Dictionarymanhole noun[ C ] us/ˈmænˌhoʊl/ an opening in a street usually covered by a heavy, metal lid, for allowing workers to reach underground pipes and wires Examples of manholemanhole The different shadings show the number of manholes in the square. The number of manholes baited varies from year to year. The different shadings show the density of rat activity (expressed as number of bait takes per 100 manholes). The number of statistically significant results found means that the null hypothesis that rodents are evenly distributed amongst the manholes must, therefore, be firmly rejected. Expected value is total number of hits divided by number of manholes r100 (true alpha=0.0132). We, therefore, restrict ourselves to saying that there tend to be more hotspots in areas of higher manhole density. It was important to determine how often annual baiting recorded their presence or activity at each manhole. Within the tests, the null hypothesis was that rats would be equally likely to be found in each manhole within the system. With the help of water utility staff the locations of these manholes were noted and added to the case-control questionnaire. Access to both systems was possible through separate manholes near the main kitchen. This aerosol may have escaped through manholes that were used for ventilation along the sewer line. There are, however, areas of high manhole density which do not show as hotspots. There is some significant evidence to link hotspots with areas with high manhole density. Expected value is total number of hits divided by number of manholes r100 (true alpha=0.0500). This is because the statistical tests assigned lower weighting to squares where there were a low number of manholes within the square. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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