查询词典 xylem rays

Just imagine no need for the shielding against dangerous Alpha- Beta- rays, no need for high voltages and pollution of the environment caused by all the plastics and metal parts production.

试想想，没有对危险阿尔法屏蔽-β需要射线，无高电压，是所有的塑料和金属零部件的生产造成的环境污染的需要。

But the positive electrons produced by aluminium under the action of a source of alpha rays continue to be emitted for some time after removal of the source. The number of electrons emitted decreases by half in three minutes.

但是，在射线动能源作用下铝产生的正电子在动能源撤走后的相当长时间里仍继续被排斥出来，且排出的电子数量在3分钟后减少一半。

The particles expelled when the atom explodes are protons, alpha rays or neutrons.

原子爆炸时排出的粒子是质子、a射线或中子。

It is calculated according as the quantity of air molecules ionized by the alpha rays decayed by radon and its progeny as the air is inhaled to the ionization chamber by the air pump.

采用的测量原理是通过气泵把空气吸入电离室内，通过测量氡及其子体衰变放出α射线使空气分子电离的量来间接测量空气中的氡浓度。

Fifteen years later, by bornharding with alpha rays certain of the lighter atoms, nitrogen and aluminium for example, Lord Rutherford demonstrated the ejection of protons, or positively charged hydrogen nuclei

15年后他用a射线轰击某些较轻的原子，如氮原子和铝原子，向人们展示质子，即带正电荷的氢核的排斥现象。

Intelligent nuclear instrument has been a dominant developing direction of radioactivity measurement instrument. The instrument for radon measurement of air pulse ionization chamber, based on the theory that alpha rays decayed by radon and its progeny can ionize the air molecules, can measure the radon concentration accurately.

智能核仪器已成为放射性测量仪器发展的一个主导方向，利用氡及其子体衰变放出α射线能使空气分子电离的理论设计的空气脉冲电离室α测氡仪可以准确地测量空气中的氡浓度。

By degrees the sun disappeared behind the western horizon; but as though to prove the truth of the fanciful ideas in heathen mythology, its indiscreet rays reappeared on the summit of every wave, as if the god of fire had just sunk upon the bosom of Amphitrite, who in vain endeavored to hide her lover beneath her azure mantle.

渐渐地，太阳消失在西方的地平线上了：但象是要证实神话家的幻想似的，尚未收尽的余辉象火焰一般跳动在每一个波浪的浪尖上，似乎告诉人们海神安费德丽蒂把火神拥在怀抱里，她虽然竭力要把她的爱人掩藏在她那蔚蓝的大毯子底下，却始终掩饰不住。

Some of the distinguishing characteristics of the yellow tail rockfish include a convex space between the eyes, the absence of spines on top of the head, a projecting lower jaw, an anal fin with eight soft rays and the lining of the belly is white.

黄尾石斑鱼的可分辨特徵包括一个凸空间之间没有刺的头、突出的下颚、一个肛门翅八的情况下的眼睛是白色的软γ射线及腹部衬。

Any of a large group of fishes of the superorder Acanthopterygii,having bony skeletons and spiny rays in the dorsal and anal fin s and including the bass,perch,mackerel,and swordfish.

棘鳍目鱼棘鳍鱼总目的各种鱼类，有骨质的外骨骼和刺状的背鳍骨以及近肛门的鳍。还包括鲈鱼，鲭鱼，和箭鱼

Without cephalic lateralis canals; vertebral count 10+16=26 (vs. 27); anal fin has 7-9 branched fin-rays (vs. 6-7); head had an irregular spot pattern which were joined together vs.

；椎骨数10+16=26(vs.27)；臀鳍分支鳍条7-9(vs.6-7)；头部斑点大小不等且不规则，常呈线状交织

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。