against sb on
反对某人
以上为机器翻译结果，长、整句建议使用 人工翻译 。
I mounted the two Spring Grip Clamps on to the seat backs of two chairs. In the clips I mounted Nikon Speedlight SB-80DX and directed them against the white wall.
我将2只大力夹夹在了2个椅子的后面，并且在夹子上安装了SB-80DX，直射背景墙。
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