经常使用的帐号至少每半年换一次密码。
Passwords you use often should be changed at least every six months.
与你的直属主管一起进行年中绩效回顾。建议每季度一次，但至少每半年一次。
During the year to review your performance with your team leader. Aim to do this every quarter but at least once each half year.
票面利率固定的债券通常每年或每半年付息一次。
Coupon is paid by a fixed-interest bond each year or each half year.
票面利率固定的债券通常每年或每半年付息一次。
Coupon is paid by a fixed-interest bond each year or each half year.
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