zero insertion

基本解释

If this argument is zero, the insertion mark will be placed before the item.
如果此蓡數是零，則將插入標記放置在指定項之前。
chenfeie.st.dprktimes.com
Zero places the insertion point immediately to the left of the first character.
將插入點設爲零時，插入點會立即移至第一個字元的左邊。
Phase shift brought by natural binary refraction does not exist in the modulator, there is no zero-field leakage, temperature stability is very good, and insertion loss is small.
這種調制器的優點是不存在自然雙折射引起的相位延遲，沒有“零場泄漏”，溫度穩定性好，插入損耗小等。