Requiring an operator in order to function("a manual exchange";"a manual executive").
说明为了正常操作需要有操作人员的工作（如人工交换、人工执行）。
so they all agreed that the following morning they would trade jobs.
因此三人一致同意隔天早上就交换工作。
Research and Realization of the Supporting Platform of Manual Telephone Exchange Net;
人工电话交换网支撑平台的研究与实现
The expansion of industry, communications and exchange will defy the imagination of past generations.
工业、交通和交换事业的发展，更是前人所不能设想的。
Asian regional exchange teams
亚洲区域交换工作队
In communications, a manual switching system where incoming messages to the switching center perforate paper tape.
在通信技术中，一种人工信息［文］换方法，即进入交换中心的（息）文用手工在纸带上穿孔。
They exchanged hostages with each other.
他们相互交换了人质.
The new switchboard shares much of the workload of the telephone exchange.
这台新式交换机大大的减少了交换台的工作量。
Yet industry observers caution that PBXs are prone to year 2000 complications.
工业界的观察家也提醒人们专用小交换机易受2000年复杂性伤害。
Farmers and herdsmen, individually or collectively, need pay no taxes for selling or exchanging their farm produce, livestock products or handicrafts.
农牧民个人和集体上市出售、交换农牧副和手工业产品，一律不收税。
The Study of Effects of Posterior Cruciate Ligament Resection on the Tibiofemoral Joint Gap in Total Knee Replacement;
人工膝关节置换术中后交叉韧带切除对关节间隙的影响
The Study of Effects of Posterior Cruciate Ligament Resectiont on the Tibiofemoral Joint Gap in Total Knee Replacement;
人工膝关节置换中后交叉韧带切除对于胫股关节间隙影响的研究
Artificial Molecular Chaperon-Ion Exchange Chromatography Assisted Refolding of Denatured/Reduced Proteins;
人工分子伴侣—离子交换色谱法辅助还原变性蛋白质的复性
Where do we seek commercial law?--Analyses from division of work,exchange,evolution process of businessman class;
到哪里去寻找商法?——从分工、交换、商人阶级的进化过程进行观察分析
Modifide proton exchange membrane fuel cell model based on ANN
基于人工神经网络改进的质子交换膜燃料电池模型
Relationship between net ecosystem carbon exchange and meteorological factors in a plantation in the hilly area of the North China
华北低丘山地人工林生态系统净碳交换与气象因子的关系
Net CO2 exchange and carbon isotope flux in Acacia mangium plantation
马占相思人工林净二氧化碳交换和碳同位素通量
someone who earn wages in return for their labor.
用工作来换取工资的人。