so to speak的用法?

so to speak:
adv.可谓(好比,如同)
例句与用法:
1.Mary is,so to speak,a hardworking student.
玛丽可说是个用功的学生.
2.He is,so to speak,a hardworking student.
他可说是个用功的学生.
3.The new procedures have been officially christened,so to speak.
新措施可以说已经正式实施了.
4.It is a lone island off the coast of Guangdong,a mere dot,so to speak,in the South China Sea.
它是广东海岸边的一座孤岛,可说是南海上的一个小点.