简单

simple; plain; brief; uncomplicated; straightforward; easy; elementary; undemanding; simply; plainly; simplicity; easiness; simplify; make simple; keep it simple; make it simple; tout court; easy as pie

对话

dialogue; conversation; colloquy; exchange; parley; dialog; converse; talk; discuss; have a dialogue; have a conversation

交流

exchange; communicate; talk; commune; interchange; interact; communication; interaction; communion; interflow; intercourse; cross-fertilization; alternating current; interactive; communicative