她用围巾遮住脸来保护自己。

She is ___masking her face with a scarf to protect herself.

尽管很生气，他还是用礼貌的语气掩饰了自己的不满。

Despite being angry, he kept ___masking his frustration with a polite tone.

在制作电路板时，工人们先要仔细地涂上掩膜层。

Workers carefully apply ___masking layers when making circuit boards.

她在Photoshop中使用了遮罩功能来突出花朵。

She used ___masking in Photoshop to highlight the flowers.