1 . 他們
theiradvice turned out to be nothing but garbage ., 他們的忠告結果證明只是垃圾一堆.
2 . 其
Implement customer loyalty programs and measure theireffectiveness ., 執行客戶忠誠度計劃并評估其有效性.
3 . 自己
Everybody has theirstrengths and weaknesses ., 每個人都有自己的長處和弱點.
4 . 它們
Big and strong enough to live outside of theirshells ., 它們將變大變強壯 , 最終破殼而出.