conj.

1. 和，及，与，同；又
   They sang and danced all night.

   他们通宵唱歌跳舞。

   My mother and father have never agreed on this matter.

   我父母在这件事情上从未意见一致过。

2. 然后
   She went to the United States in 1960 and has lived there ever since.

   她于一九六○年去了美国，此后就一直住在那里。

3. 而且
   You must stop, and at once, this sort of behavior.

   你必须停止此类行为，而且必须立即停止。

4. 就；所以，因此
   Go straight on and you'll see a church.

   一直走下去你便可以看到一座教堂。

5. 而，但是
   Vegetable oil is digestible and mineral oil is not.

   植物油易消化而矿物油则不行。

conj.

1. used to connect words of the same part of speech, clauses, or sentences.
   ▸connecting two identical comparatives, to emphasize a progressive change.
   ▸connecting two identical words, implying great duration or great extent.
2. used to connect two numbers to indicate that they are being added together.
   ▸archaic connecting two numbers, implying succession.
3. used to introduce an additional comment or interjection.
4. informal used after some verbs and before another verb to indicate intention, instead of ‘to’.

n.

1. a logical operation which gives the value one if and only if all the operands are one, and otherwise gives a value of zero.
2. [as modifier] Electronics  denoting a gate circuit which produces an output only when signals are received simultaneously through all input connections.