sub读法如下：
英 [sʌb]，美 [sʌb]
n.替补队员；（向俱乐部等定期交纳的）会员费；助理编辑；审校人；潜水艇
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v.（在比赛中）替换（队员）；暂代（某人）工作；替班；代用
adj.补充的
prep.…的下面的
网络子过程(subprocess)；子程序(subroutine)；辅助
变形复数：subs；过去式：subbed；现在分词：subbing；
英英释义
sub[ sʌb ]
n.
a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
同义词：bombergrinderherohero sandwichhoagiehoagyCuban sandwichItalian sandwichpoor boysubmarinesubmarine sandwichtorpedowedgezep
a submersible warship usually armed with torpedoes
同义词：submarinepigboatU-boat
v.be a substitute
"The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream--we are on a strict diet"
同义词：substitutestand infill in