to no purpose
... 撕成碎片 to one's cost 成了某人的損失 to sb's credit 是某人的光榮 to no purpose 徒然 to the point [purpose] 中肯 to one's surprise [joy, sorrow] 感到驚奇[高興、傷心...
... other words, we ought to exactly know what to do next rather than fool around to no purpose all day long. In summary, we just must not fall short of the expectations...
...touch =keep in contact. 保辭連絡的意思 In vain =to no avail =of no avail =to no purpose =vainly =徒勞無功