中文：

股票增发是指上市公司在原有股票的基础上，再次发行新的股票，以增加公司的资本规模。股票增发通常是为了扩大公司的业务规模、提高公司的财务实力、增加公司的投资价值，或者为公司的其他发展计划提供资金支持。

股票增发的方式有多种，包括公开增发、配售、私募等。公开增发是指上市公司向公众公开发行新的股票，以获取更多的资金。配售是指将新的股票分配给现有的股东，以增加公司的资本规模。私募是指向特定的投资者发行新的股票，以获取资金。

股票增发对投资者来说，既有利又有弊。一方面，投资者可以通过购买新的股票来获取更多的投资机会和收益；另一方面，投资者需要承担更大的投资风险，因为新的股票发行可能会对原有的股票价格产生影响。

英文：

Stock additional issuance refers to the company's additional issuance of new stocks on the basis of existing stocks to increase the company's capital scale. Stock additional issuance is usually to expand the company's business scale, improve the company's financial strength, increase the company's investment value, or provide financial support for the company's other development plans.

There are various ways of stock additional issuance, including public additional issuance, placement, private placement, etc. Public additional issuance refers to the company's public issuance of new stocks to obtain more funds. Placement refers to the allocation of new stocks to existing shareholders to increase the company's capital scale. Private placement refers to the issuance of new stocks to specific investors to obtain funds.

For investors, stock additional issuance has both advantages and disadvantages. On one hand, investors can buy new stocks to obtain more investment opportunities and returns; on the other hand, investors need to bear greater investment risks, because the issuance of new stocks may affect the price of existing stocks.