任何部门不得私自修改招标条件,否则结果可能被认定无效。Rènhé bùmén bù dé sīzì xiūgǎi zhāobiāo tiáojiàn, fǒuzé jiéguǒ kěnéng bèi rèndìng wúxiào.No department may alter the tendering conditions without authorisation, otherwise the result may be deemed invalid.
他私自把公司的钱借给了亲戚,结果被开除了。Tā sīzì bǎ gōngsī de qián jiè gěi le qīnqi, jiéguǒ bèi kāichū le.He lent the company's money to relatives without permission and was fired as a result.
没有医生的指导,你不要私自增加药量。Méiyǒu yīshēng de zhǐdǎo, nǐ bú yào sīzì zēngjiā yàoliàng.Without a doctor's guidance, don't increase the dose on your own authority.