(1)以某种方式(手段)(in some way or other;by some means)：I'll finish this work/get there on time～. 我要设法完成这件工作/准时到达那里。Don't you think we'll have to reach an agreement～? 难道你不认为我们得设法达成一项协议吗?

(2)不知为什么(for some unknown or unspe-cified reason)：That meeting got on my nerves，～. 不知怎么回事，那次会面使我心绪不宁。S～he was afraid of her. 不知为什么他怕她。