back three step 中文意思是什麼

back three step 解釋
後退三直步
  • back : n 1 背，背部；背脊；背面，反面；背後，後部，後面，裏面。2 （指）甲；（刀）背；（手）背；（書）背...
  • three : n. 1. 三個人[東西]。2. 三歲，三時。3. 【板球】3字型。
  • step : vi （ pp ）1 走；跨步。2 踩，踏上 （on）。3 跳舞，輕快地走，合著步調走。4 跨入，踏進。5 走上。vt ...
  1. Damon said that his two outfield dives in his last three games probably played a part in the hamstring issue, but taking a step back to look at the bigger picture, damon believes that the wide expanses of fenway park ' s center - field area did him no favors

    大門說也許是過去三場比賽在外野撲接球是造成他大腿傷的原因之一，但是回到整體面上來看，大門相信寬闊的芬威球場中外野區對他來說沒什麼不同。
  2. The design of excitation power source based on principle of three phase step motor and pulse width modulation ( pwm ) technology, intelligent power model ( ipm ) is used for inverter switches, the output ac pulse used as excitation signals. the speed of rotation and magnetic intensity can be changed by regulate the exciting converted frequency and magnitude of exciting current. constant current is achieved by closed loop feed back

    勵磁電源結合步進電機原理與脈寬調制技術，選用智能功率模塊ipm作為逆變開關器件，輸出交流脈沖勵磁信號，以調節勵磁轉換頻率和勵磁電流大小為手段，實現對磁場旋轉頻率和磁場強度大小的有效調節，並通過閉環反饋實現閉環恆流控制。
  3. Effect of geometry of back - step on heat transfer coefficients in three dimensional slots

    幾何結構對后臺階三維縫隙換熱影響的研究
  4. Numerical investigation of back - step three dimensional slots on film cooling effectiveness

    后臺階三維縫隙冷卻效率的數值模擬
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