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TranslationMobile

"reversing" in Chinese : adj. 回動(dòng)的，倒進(jìn)的。 a reversing ke ...
"key" in Chinese : n. 礁，暗礁(＝cay, quay)。
"current reversing key" in Chinese : 電流換向開(kāi)關(guān)
"current-reversing key" in Chinese : 電流換向開(kāi)關(guān)
"pole reversing key" in Chinese : 倒極開(kāi)關(guān)
"reversing" in Chinese : adj. 回動(dòng)的，倒進(jìn)的。 a reversing key 【電學(xué)】換向電鑰 ...
"be the key to" in Chinese : 對(duì)......至關(guān)重要
"key" in Chinese : n. 1.鑰匙。 2.要害，關(guān)口，要沖。 3.關(guān)鍵，線索，秘訣；解法。 4. ...
"key in" in Chinese : 插上; 鍵盤輸入; 鍵入; 輸入
"key on" in Chinese : 接通用鍵固定
"key to" in Chinese : 對(duì)…干擾
"no key" in Chinese : 高考英語(yǔ)語(yǔ)法
"the key" in Chinese : 鑰匙; 云雨夜未央
"the key to" in Chinese : 關(guān)鍵是(在于)
"to key in" in Chinese : 鍵入; 敲入

Reverse key index cannot be used for range scan
回復(fù)：建了反向索引，為什么系統(tǒng)不使用索引了？
Current reversing key
電流換向開(kāi)關(guān)
In a quick test on a table with 100 , 000 rows loaded using a sequence , a normal index was used for most queries returning up to 30 rows , as was the reverse key index , however , when the number of rows went up to 1 , 000 , 000 the reverse key index was never used and a full table scan was used every time
在一個(gè)用一個(gè)序列載入并含100 , 000行的表上做一個(gè)快速的測(cè)試，分別用普通索引和逆序索引查詢并返回30行數(shù)據(jù)，當(dāng)行數(shù)增長(zhǎng)到1 , 000 , 000 ，將不再使用逆序索引而是每次使用全表掃描。

"reversing key" meaning in Japanese: reversing key 転極電けん[電情]; 転極電けん[機(jī)械]; 転極電鍵[電情]
"reversing key" meaning in Russian: переключатель направления тока