presentation layer的用法和樣例：
例句
- The recommended approach is to separate the data access logic from the presentation layer.
建議的方法是將數據訪問邏輯與表示層分離。 - They do format the screen and accept keystrokes,but they can't handle other aspects of presentation logic,such as screen sequencing and data validation.
它們的確編排了屏幕顯示格式，並接收敲鍵輸入，但它們不能處理表示層其它的邏輯操作，如屏幕顯示時序排列和數據驗證等。
