冲浪教练举起手比了个沙卡手势，表示玩得开心。

The surf instructor raised his hand with a ___shaka to say 'have fun'.

看到我带了冲浪板，她竖起了大拇指并比了个shaka手势。

When she saw my surfboard, she gave a thumbs-up and flashed a ___shaka.