His hands have become calloused, because he does heavy manual work every day.

　　他的手每天都做重活，不久就磨出了趼子。

　　You are being rather callous.

　　你真狠心。

　　I believe in being candid and open to different points of view.

　　我信奉以誠實坦誠的態(tài)度對待不同的觀點。

　　Experimental results show the fine performance of our improved Canny operator.

　　實驗結(jié)果顯示了改進(jìn)Canny算子的良好檢測性能。