Include obscure middle initials - like your mother's maiden name or a childhood nickname - that not many people know about for extra security.
包括隐藏着的中间名字的首字母，比如你妈妈的娘家姓或者小时候的乳名，只要不是太多人知晓即可相对安全些。
The forth chapter is the comparison between phonological system of Shimen dialect and the Middle Age phonetics in initials, finals, tones.
第四章对石门方言音系与中古音的声母、韵母、声调做了比较。
Some people just go by the initials of their first and middle names, like B. j.
有些人干脆用第一和第二个名字的首字母作为称谓，像是B。
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