射擊低於 的英文怎麼說
中文拼音 [shèjīdīyú]
射擊低於
英文
undershoot-
The losses in the low-level attacks on the bridges from the german anti-aircraft artillery were cruel.
在低空轟炸浮橋時，英國空軍由於德國高射炮炮擊造成的損失是很慘重的。A second later they opened fire, the deeper boom of their pistols accompanied by the sharp tap - tap - tap of the new, compact machine rifles that were so much handier than the army ' s old lewins
一秒鐘后，他們開始射擊，手槍低沉的砰砰聲，還有輕快的手提機槍的嗒嗒聲，與軍隊的老式利文斯槍相比更加便於手持。The thermal visualizations of jet impingement cooling with single or double row holes inside semi - enclosed channel are measured by using infrared camera and then the impingement cooling heat transfer coefficients are deduced. the effects of flow and geometry parameters on convective heat coefficients are obtained. the results show that : for a single row normal impingement, the impingement cooling effectiveness is enhanced with the increase of impinging reynolds number or the decrease of hole space to diameter ratio, and the best effectiveness is achieved under the jet - to - surface spacing equals to 2 ; when the jet is oblique to the confined wall, the cooling effectiveness is weaken especially under the jet - to - surface spacing ratio is greater than 2 ; for double rows normal impingement cooling, the cooling effectiveness of rear row jet is weaker than the front row under lower impinging reynolds number or bigger jet - to - surface spacing
對于單排垂直射流，沖擊冷卻效果隨射流雷諾數的增加、孔間距與直徑比的減小而得到提高，沖擊間距比為2時換熱效果最好;沖擊孔中心線向通道封閉一側傾斜后，射流沖擊冷卻的范圍變窄，當沖擊間距比大於2時駐點區的對流換熱能力明顯降低;對于雙排沖擊射流，孔排間距與直徑比的增加使沖擊冷卻范圍變大，但在兩排孔之間區域的對流換熱系數有所下降;在較小的沖擊射流雷諾數和較大的沖擊間距比下，後排射流的沖擊換熱效果要遜於前排射流。At first in the condition of low - velocity impact it is discussed with the formation of ceramic smash cone angle on the base of quasi - statistic hertz and 3 a 6 y a c - theory. then using spherical stress wave reflection and transmission theory under the state of medium - high velocity the formation of spot in the ceramic back. finally the damage mechanism of ceramic suffered by the high impact is simply discussed
首先，在低速撞擊的條件下，基於準靜態hertz的理論與薩布斯基理論，分析了陶瓷破碎錐角的形成；其次，在中高速撞擊條件下，利用球面應力波反射迭加理論，分析了陶瓷背面的層裂的形成；最後，簡單討論了高速撞擊下陶瓷的破碎機理。While the speed is very large, the fuel - air mixing behind the airstream is decreased and the span that the fuel flow in the second combustor is reduced, so the combustion efficiency is decreased, h ) if the fuel streams impinge with the airstreams directly at the air - inlet exit, it make against increasing the combustion efficiency, i ) increasing air - to - fuel ratio within proper range can increase the combustion efficiency
增加燃氣噴射速度有利於增強迴流區強度，頭部燃燒溫度上升，但速度太大則會減弱燃氣同空氣在進氣道下游的摻混燃燒，減少燃氣在室內停留時間，燃燒效率降低； 8燃氣射流與空氣流在進氣道出口直接撞擊不利於燃燒效率的提高； 9在適當范圍內增大空燃比能顯著提高燃燒效率。If metal shielding exceeds a centimeter, electromagnetic protection declines drastically, he explains, because impacts by energetic particles can cause strong electromagnetic bremsstrahlung radiation that can result in extensive damage. ( bremsstrahlung is german for the “ braking radiation ” produced when a charged particle decelerates rapidly as a result of collision with another body
他進一步解釋，金屬防護層厚度超過一公分時，電磁防護能力將大幅降低，因為受高能粒子撞擊時，會形成強大的制動輻射，造成更大的損害（制動輻射是由於帶電粒子碰撞其他物體而突然減速所造成） 。In indirect mode, the rate of fire is lower than with direct fire
在彈道射擊模式下，開火速度低於直瞄射擊模式。分享友人