MyCn18之所以呈现出沙漏的外形，是因为一个缓慢扩张的云团里迅速向外冲去的恒星风造成的，其“赤道”附近的云团密度要大于两极。
MyCn18's hourglass shape is thought to have arisen from the expansion of a fast stellar wind within a slowly expanding cloud which is denser near its equator than its poles.
利用本质子群与本质扩张的概念，证明了极根类恰是本质闭类。
By the basic concept of essential subgroups and essential extensions, a surprising result is given in this paper.
血管畸形中血管极度扩张，VEGF表达极弱。
In vascular malformation, vessels dilated abnormally with weakly expressed VEGF.
在热带地区，一整年都是流感好发季节，倘若赤道附近的热带性气团向两极扩张，一些季节错乱的地区便可能发觉流感疫期已稍稍延长。
Influenza is a year-round event in the tropics. If the tropical airmass around the Earth's equator expands, as new areas lose their seasons they may also begin to see influenza year-round.
所见：给药前平扫发现右下极肾集合系统扩张，含非均一性高密度带。
Findings: On pre-contrast images, there is expansion of the right lower pole collecting system, containing heterogeneous hyperdense material.
在无补偿直流牵引电动机中，通常采用主极极弧为圆弧的扩张气隙来改善换向器电位特性。
The opening air-gaps with circular main pole arc are usually used to improve the potential curve of commutator on non-compensable d. c. traction motors.
在无补偿直流牵引电动机中，通常采用主极极弧为圆弧的扩张气隙来改善换向器电位特性。
The opening air-gaps with circular main pole arc are usually used to improve the potential curve of commutator on non-compensable d. c. traction motors.
应用推荐