The convictions represent one of the biggest blows against match-fixing in cricket since it emerged that the practice was rife two decades ago.

自从板球运动诞生以来，舞弊行为在20年前就已经普遍流行，而此次定罪只是打击板球比赛舞弊行为最严厉的措施之一。

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Practice began in 1993, she owns nearly two decades of law practice experience, from kinds of nearly 600 agents, has accumulated a wealth of practical legal experience.

1993年开始执业，拥有近二十年的律师执业经历，代理各类案件近600起，积累了丰富的法律实务经验。

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The FAA has used designated company employees to oversee and validate some safety testing for more than two decades, a practice critics complain has inherent conflicts of interest.

NPR: NTSB Probes Safety Testing Of Boeing 787 Batteries

Disclosing vulnerabilities has been standard practice in the security industry for the better part of two decades.

WSJ: Computer Experts Face Backlash