gimmick

「gimmick」是「花招、把戲、竅門」，例如：

The funny accent of the salesman was just a gimmick.（那推銷員的搞笑口音只是噱頭。）

The exhibition is informative, up to date, and mercifully free of gimmicks.（這展覽的豐富內容是最新的，而且還好不需要花招攬客。）

Those volunteers didn't use gimmicks to sell our products.（這些義工幫我們銷售產品不靠噱頭。）

bolt from the blue

「bolt from the blue」是「突如其來的意外；晴天霹靂」 ，例如：

The dismissal of our school principal came as a bolt from the blue for us.（對我們而言，校長被解雇就像是晴天霹靂。）

The news struck me like a bolt from the blue, and I could not believe it.（這消息使我震驚，幾乎無法相信。）

Inspiration hit Jack like a bolt from the blue on his way home.（在回家的路上，傑克突然靈光乍現。）

「teeter」是「晃動、踉蹌、搖搖欲墜」 ，例如：

The old man teeters from side to side like a tall mast on a small ship in heavy waves.（老人走路搖晃，如同小船上的高聳桅杆在大浪中搖搖欲墜。）

The cup teeters for a while on the edge before it fell to the ground.（那杯子摔落地面之前，先在邊緣搖動了一會兒。）

The babies often teeter before they learn to walk.（嬰兒學會走路之前步履蹣跚。）