只有公司负责人才能代表公司签署合同。

Zhǐyǒu gōngsī fùzérén cái néng dàibiǎo gōngsī qiānshǔ hétóng.

Only the person in charge of the company can sign contracts on its behalf.

两国领导人将在明天正式签署这一重要文件。

Liǎng guó lǐngdǎorén jiāng zài míngtiān zhèngshì qiānshǔ zhè yì zhòngyào wénjiàn.

The leaders of the two countries will formally sign this important document tomorrow.