| 词汇 | locust |
| 释义 | locust noun[ C ] uk /ˈləʊ.kəst/ us /ˈloʊ.kəst/ a large insect found in hot areas that flies in large groups and destroys plants and crops: 蝗虫 a swarm of locusts一大群蝗虫 Digital Zoo/DigitalVision/GettyImages Insect names anopheles ant aphid beastie bedbug deathwatch beetle dragonfly dust mite earwig earworm house dust mite housefly insect jigger ladybird silverfish sow bug spider mite stick insect swallowtail locust | American Dictionarylocust noun[ C ] us/ˈloʊ·kəst/ any of several types of large grasshoppers (= insects with wings and long back legs) found esp. in hot areas: a swarm of locusts Examples of locustlocust During the dry season the locusts could be approached nearer than during the rains, owing to their inactivity when the humidity is low. Various grasses were introduced into the cage to determine whether the locusts exhibited a preference for any particular species of grass. At this point, villages were teetering on the brink of famine as locust invasions threatened to consume the limited food crops that had been planted. The wing femur and pronotum-depth head-width ratios were determined for locusts collected in 1930, 1931, 1932 and 1933. After the preliminary work, a programme was drawn up which included a study of both phases of the desert locust. In the countryside, the absence of government measures to ensure pest control made farmers' efforts to deal with a swarm of locusts futile. The chronicles tell us about such natural phenomena as rainy years, periods of drought, famines, locust plagues, and epidemics. Treated locusts reared in field cages or in the laboratory can be used to confirm the field data. The field assessments were supported by data from locusts kept in field cages. Cages were checked twice a day for mortality and any dead locusts counted and removed. Intelligent life, in the long term, ought to appear as a horde of locusts, devouring all matter in its domain. A similar situation occurs in the male desert locust which, during the gregarious phase, breeds under crowded conditions. From the beginning, the sages warn that there will be locusts, dearth, hunger, and death. Various kinds of hunger crises caused by natural disasters such as drought, invasions of locusts, blight and other pests and epidemics can be categorized. It is of interest, however, that the locusts in the jars ate at least four times as much food as those in the cages. 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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