1、mark

斑點;污點;污跡

The dogs are always rubbing against the wall and making dirty marks.

那些狗老是往墻上蹭，留下了斑斑污跡。

A properly fitting bra should never leave red marks.

合適的胸罩不會留下紅色勒痕。

（使）留下印跡;（使）留下污痕

Leather overshoes were put on the horses' hooves to stop them marking the turf.

馬蹄上套了皮套子，以免弄臟賽馬場。

I have to be more careful with the work tops, as wood marks easily.

我必須格外小心使用操作臺，因為木頭容易留下污跡。

標示;為…作記號;為…作標記

The bank marks the check certified.

銀行在支票上標有“保付”的字樣。

Mark the frame with your postcode.

在這一格里寫上你的郵政編碼。

2、prevent

防止；預防；阻止

These methods prevent pregnancy.

這些方法能防止懷孕。

Further treatment will prevent cancer from developing.

進一步的治療將阻止癌癥惡化。

阻止；制止；阻礙

He said this would prevent companies from creating new jobs.

他說這將使公司無法創造新的工作機會。

Its nationals may be prevented from leaving the country.

其國民可能會被禁止出境。