screen against〔from〕(v.+prep.)
▲screen sb/sth against〔from〕 sth
1.遮挡〔掩蔽〕…以防…侵扰〔伤害〕cover (sth) or hide (sb) so as to protect it or him from (sth harmful)
〔说明〕screen against〔from〕通常不用于进行体。
The wall screens them against the wind.墙为他们挡风。
He screened his eyes from sunlight.他遮蔽着眼睛,使其不受阳光照射。
2.保护(某人)使之免于遭受…protect sb from (blame, punishment, etc.)
I can't screen you under that situation.在那种情况下,我无法袒护你。