Professor Liu claims that the second, practical phase of software engineeringadvancement in China began in the 1990s and has produced more than 3,000 software enterprises.
刘教授指出，中国软件工程业的第二个，即实践阶段开始于二十世纪九十年代并产生了3000余个软件企业。
2
Advancement in reverse engineering field upgrades the ability to analyze software, and on the other hand, it brings more challenge to software security.
逆向工程领域的进步，一方面提升了软件分析能力，另一方面，给软件安全带来更大的挑战。
3
During the anchoring and shotcreting construction at the rock heading blast advancement face, problems such as support strength can not be guaranteed or engineering quality uneasy to control exist.