动词试探
1. 试探：plough a lonely furrow 孤独地行动 | plough around 试探 | plough back 再投资
2. 试探, 打听：take a plough 考试不及格 | plough around 试探, 打听 | plough back 把(草等)犁入土中(作肥料 把(利润)投入原企业
3. 试探/打探：plough /犁/耕地/用犁耕田/开路/耕/耒/耜/ | plough around /试探/打探/ | plough back /再投资/犁田/