试行: to try out, to test...
口子: hole, opening, cut, gap, gash, my husband or wife, classifier for people (used for indicating the number of people in a family etc), precedent...
忽高忽低: low and high...
争气: to work hard for sth, to resolve on improvement, determined not to fall short...
封: to confer, to grant, to seal, (a measure word)...
痴心: infatuation...
欢迎: to welcome, welcome...
相关: related, relevant, pertinent, to be interrelated, (statistics) correlation...
防御: defense, to defend...
可信: trustworthy...
