zhēn zhèng / hé zuò / jiù / yīng gāi / tǎn chéng / xiāng dài / bù néng / wèi le / bǎo zhù / yōu shì / ér / liú yī shǒu

真正合作就应该坦诚相待，不能为了保住优势而留一手。

True cooperation requires openness; you should not hold something back just to keep an advantage.