第二意思是这样的,lean后面可以加副词和介词.eg.She leant against his shoulder.她靠在他的肩上.He leant on the back of the chair.他斜靠在椅背上.
做依赖讲时,lean on 或者是lean upon.eg.The minister leans on his advisers (for support).这位部长依靠他的顾问（给予支持）.
后面括号的意思就是可以加这样的词.