delay, postpone, defer, suspend, prolong, put off
这些动词或短语动词均有“推延，延期”之意。
delay : 普通用词，多指因外界原因推迟或耽误，也可指有意推迟。
My delay in going abroad is due to my illness.(我推迟出国是因为我生病了。)
postpone : 正式用词，语气较强，多指有安排的延期，常指明延期到一定的时间。
They postponed leaving because of the weather.（他们因天气原因而延迟离开。）
defer : 正式用词，语气强于postpone，多指故意拖延。
The department deferred the decision for six months.（这个部门推迟了六个月才作决定。）
suspend : 指暂时中断以待某种条件的实现。
Both sides in the conflict have agreed temporarily to suspend hostilities.（冲突双方同意暂时停火。）
prolong : 指把时间延长至超过正常或通常的限度。
Two countries prolonged signing an agreement until details could be agreed on.（两国推迟签约直到就细节达成协议。）
put off : 口语用词，与postpone同义，但较通俗。
The appointment was put off because of his illness.（由于他生病而推迟了约会。）
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