羊蚤的英文：
sheep tick

sheep是什么意思：
n. 羊，绵羊；胆小鬼

Cast sheep's eye
暗送秋波

The death of wolves is the safety of sheep
狼死羊安

It is a small flock that has not a Black sheep
家家难免有败类

The death of wolves is the safety of the sheep.
狼死羊群安。

There is a black sheep in every flock.
在每一群羊中总有一只黑羊（害群之马）。

tick是什么意思：
n. 嘀嗒声；钩号；记号；蜱，壁虱；一瞬间；赊账
v. 嘀嗒作响；打钩；标记号（于）；做出…举动

The tick is straw.
这是个草垫子。

colorado tick fever
科罗拉多壁虱热

Place a tick in the appropriate box.
在相应的方框里打钩。

That really ticks me off!
这确实使我很恼怒！

They arrived at six to the tick.
他们六点准时到达。