| 词汇 | cocoon |
| 释义 | cocoon noun uk /kəˈkuːn/ us /kəˈkuːn/ cocoonnoun (COVER)[ C ] the covering made of soft, smooth threads that surrounds and protects particular insects during the pupa stage as they develop into adult form茧;卵袋 PBNJ Productions/Blend Images/GettyImages The skin, hair & bone of non-human animals ala baleen bristle bristly coated cowhide dander downy feather fleece mane plumule sable seashell spine spinneret spiny vibrissa whalebone whiskery You can also find related words, phrases, and synonyms in the topics: The development & parts of insects cocoonnoun (PROTECTED PLACE)[ Cusually singular ] a safe, quiet place: 安全宁静的地方;避风港 the warm, safe cocoon of childhood童年生活的温馨安逸、备受呵护 Safe & enclosed spaces awning bolthole booth bunker bus shelter carrel childproof childproofing dugout foxhole haven hideaway hideout hidey-hole recess refuge retreat safe haven safe house sanctuary cocoon verb[ Tusually passive ] uk /kəˈkuːn/ us /kəˈkuːn/ to protect someone or something from pain or an unpleasant situation: 给…加上保护层，将…裹住 be cocooned fromAs a student, you're cocooned from the real world. be cocooned againstStuck in the house, cocooned against the cold outside, he learned the secrets of the place. Defending and protecting air defence anti-bug anti-mosquito baby bandobast defensive duck duck and coveridiom embedded featherbedding fight back hedge insulate poisonous security camera security light self-protective self-protectiveness shelter smother cocoon | American Dictionarycocoon noun[ C ] us/kəˈkun/ the silky covering that encloses and protects caterpillars (= a type of insect) during a stage in their lives before they develop into adults fig. A cocoon is also a safe, quiet place: the warm, safe cocoon of childhood Examples of cocooncocoon However, adult eclosion did not always occur from cocoons derived from hosts that had been parasitized at the later time points. Six days later the female was supplied with similar cocoons and with one not covered with strawboard. However, second and fourth instars were also readily attacked, together contributing almost 50% of the final number of parasitoid cocoons produced. Under natural conditions, most cocoons were found in the upper 1 cm of sand within a radius of 500 cm from the nest. The host larvae hatched, entered the apples, and when fully fed, emerged and made their cocoons. Therefore, a second set of parasitized cocoons was left intact until the seventh day after oviposition and then carefully opened. Parasitized cocoons were put into a climate chamber immediately after the female completed oviposition. The cocoons were transferred to ventilated plastic containers for adult emergence and mating. The cocoons were collected and placed in clean containers for adult emergence. On the other hand, the soil was less compressed in the frames than in the field, making access to host cocoons easier. Each generation, 150-200 cocoons were chosen at random from more than 1000 cocoons to produce adults for maintaining the culture. Parasitoid cocoons were weighed, the wasp development time calculated and adult emergence monitored. To make silk, the filaments from several cocoons are unwound and reeled together, resulting in fibres of extraordinary strength. All cocoons that formed from parasitized hosts were removed from the stems and kept separately in vials plugged with cotton wool. All individuals emerged from the same sample of cocoons. See all examples of cocoon 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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