基本解釋[數(shù)學(xué)]抽象算子英漢例句雙語例句The other value in using the abstraction layers of the PEAR DB module and PDO is that you can use the ? operator in your SQL statements.使用 PEAR DB 模塊和 PDO 抽象層的另一個(gè)價(jià)值在于您可以在 SQL 語句中使用 ? 操作符。A new mobile operator context with two partitioned use cases and a new actor (Simpay Ltd.) has been derived from the higher abstraction level.帶有兩段用例和一個(gè)新參與者（Simpay 有限公司）的新的移動(dòng)操作者語境已經(jīng)由更高抽象層派生出來。abstraction operator更多例句專業(yè)釋義數(shù)學(xué)抽象算子