motivation

下面三句都是公文英语：

• George was motivated by social prejudice.
• Political motivation masqueraded as moral indignation.
• The motivation of Robin's secession was obscure.

第一句=George was moved by（或acted upon）social prejudice.

第二句=Political motives was disguised as moral indignation.

第三句=Why Robin seceded, we do not know.