watch, monitor, observe, look, keep an eye on, supervise

observe, balance, predestine

note, pay attention, be careful, notice, look out, observe

adhere, abide by, observe, tie up, hook up

observe

observe, sample, survey

realize, understand, recognize, see, perceive, observe

consider, keep, observe, pay attention, get by, consult

demonstrate, observe

observe

observe

observe

observe

observe

distinguish, differentiate, recognize, identify, characterize, observe

observe, twig, notice, take notice, note, perceive