Issue regarding the applicability of enhanced fins was raised and then discussed with the fin-tube heat exchanger as an example.
提出强化翅片的适用性问题并以管翅式换热器为例进行了讨论,认为管翅式换热器空气侧流路由三要件所组成,即换热器、换热器外部风路和风机,指出强化翅片的效果不仅与翅片自身的性能有关而且与外部风路流阻的相对大小有关。
Advanced summarization of studies on wing dimorphism of the rice brown planthopper;
稻褐飞虱翅型分化研究进展
Effects of nymphal density and rice growth stage on nymphal development, survival rate and wing dimorphism of different rice brown planthopper biotypes;
若虫密度和水稻生育期对稻褐飞虱不同生物型若虫历期、存活及翅型分化的影响
Experiments were carried out with the pure-bred strains of both macropterous(M) and brachypterous(B) brown planthopper(BPH) ,Nilaparvata lugens (Stal) biotype Ⅱ ,biotype Bangladesh and biotype Cuulong Delta in order to know the effects of parents, rice growth stage and population density on the wing dimorphism of F1 progenies.
结果表明:稻褐飞虱3种生物型子代的翅型表型与亲代的遗传关系密切,但各生物型子代的翅型表型存在差异;在多头饲养条件下,水稻生育期对3种生物型翅型遗传的调节作用较为明显,但这种影响同亲代翅型和褐飞虱所属生物型有关;在单头饲养条件下,稻株生育期对不同生物型翅型分化几乎没有影响,但亲本遗传的制约依然存在。
a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings.
暖血孵卵脊椎动物的一科，有羽毛，其前肢已退化翅膀。
The wings of the chicken have become vestigial; it can no longer fly.
鸡的翅膀逐渐退化，不会在空中飞行了。
insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing.
通常有一对实用翅膀（前翅）的昆虫，后翅退化为小圆块，嘴分裂适于吮吸或舔食或刺穿。
a ratite bird order: flightless ground birds having vestigial wings and long bills and small eyes: kiwis.
一种平胸鸟目；小眼睛长嘴且翅膀已退化的不会飞的鸟类几维。
Any of various luminous female beetles or beetle larvae of the families Phengodidae and Lampyridae, especially the larva or wingless grublike female of a firefly.
萤火虫一种发光的萤科雌性甲虫或幼虫，尤指退化或缺翅的蛆状的雌性的发光飞虫
medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast.
中型到大型得蝴蝶，分布广泛，特征是有色彩鲜亮的翅膀，几乎退化的无作用的前腿折放在胸前。
Either of the small, clublike balancing organs that are the rudimentary hind wings of flies and other dipterous insects.
平衡棒苍蝇或其它双翼昆虫退化了的后翅所形成的两个小的棒状平衡器官之一
Regulatory mechanism and evolution of insect wing polymorphism
昆虫翅型分化的调控及翅多型性的进化
The state of being degenerate.
退化堕落或退化的状态
insect having biting mouthparts and front wings modified to form horny covers overlying the membranous rear wings.
一种昆虫，尖嘴，前翅进化为覆盖于后翅的角质膜。
The process of degenerating.
衰退堕落或退化过程
To undergo degeneration.
经历退化、衰退、堕落.
NEW EARLY CRETACEOUS LALACID FROM JINGXI BASIN OF BEIJING, CHINA (HOMOPTERA: FULGOROIDEA)
北京京西盆地早白垩世同翅目化石一新属(同翅目:蜡蝉总科)(英文)
Reclassification of Fossil Orthophlebiidae(Insecta:Mecoptera)
化石直脉蝎蛉科再分类(长翅目)(英文)
Investigation the Chemical Constituents and Bioactivity of Saussurea Cauloptera;
翅茎风毛菊化学成分及生物活性研究
Optimization of Aqueous Enzymatic Extraction of Elaeagnus mollis Seed Oil
水酶法提取翅果树种子油的工艺优化
First discovery of Midtriassic order Miomoptera(Insecta) in China
小翅目化石在中国首次发现(英文)
A corresponding rudimentary gland in the male.
退化乳房男性相应的退化乳房