自暴自弃【zì bào zì qì】
have no ambition at all; be resigned to one’s backwardness; give oneself up as hopeless
[成]自甘落后，不求上进
 自暴自弃的人是不会有什么成就的。 Those who give themselves up as hopeless can achieve nothing.
自卑【zì bēi】
feel inferior; be self-abased; self-abasement; self-contempt; self-humiliation
[形]轻视自己，觉得自己不如别人
 自卑的人应该得到更多的鼓励。 Those who feel themselves inferior should get more encouragement.
自不量力【zì bú liàng lì】
not to recognize one' s own limited strength or resources
[成]不能正确估量自己的能力﹐对自己估计太高
 蚂蚁想绊倒大象，真是自不量力。 An ant who wants to stumble an elephant does not recognize its own limited strength.
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自吹自擂【zì chuī zì léi】
blow one' s own trumpet
[成]自己吹嘘自己
 喜欢自吹自擂的人容易引起别人的反感。 A man who likes blowing his own trumpet is very likely to arouse others’ dislike.
自从【zì cóng】
since; ever since; from
[介]表示时间的起点（指过去）
 自从我们上次分别后，已经有很长时间了。 It has been a long time since we last meet.
自动【zì dòng】
1. automatic 2. voluntarily; of one's own accord
[形]1、不用人力而用机械、电气等装置直接操作的 2、自己主动
 这个暖气系统有自动的温度调节系统。 This heating system has an automatic temperature control.
 现在，越来越多的人自动参与到环保活动中。 More and more people voluntarily join to protect the environment.
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自发【zì fā】
spontaneous
[形]不受外力影响而自然产生
这次募捐活动是学生自发组织的。 The fundraising event was organized by students spontaneously.
自费【zì fèi】
at one's own expenses
[形]自行承担花销经费
 现在，读研究生大部分要自费。 Now, most graduate students pay tuition fee by themselves.
自负盈亏【zì fù yíng kuī】
take on full responsibility for the success of a business
[动短]赢利与亏损都由自己负责，没有上级或他人的责任
 企业实行自负盈亏有利于发挥企业的积极性。 Being responsible for its own profit and loss helps to bring an enterprise’s initiative into full play.
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