The new billing system is more complex than the one our accounting team used before.

新的帳務系統比我們會計團隊以前用的那套更複雜。

Please review the complex shipping regulations before sending these packages to overseas clients.

寄送這些包裹給海外客戶之前，請先詳讀複雜的運輸法規。

Our customer service agents receive extra training to handle complex complaints about product defects.

我們的客服人員會接受額外訓練，以處理有關產品瑕疵的複雜客訴。