个人感想:总地来说 vocalbulary.com>nytimes.com>wordnik.com>quizlet.com
为什么Vocabulary.com 好呢?
1.释义好记且调皮,
以canard 为例子
During a political campaign, you will often hear on TV commercials some canard about the opponent. This is a false, deluding statement designed to confuse the voters, as it presents the other candidate in a bad light by spreading an untruth.
The Old French word quanart, "duck," morphed into canard, as in "vendre un canard à moitié," which refers to "half-selling" a duck, or cheating someone, and the word came to mean something meant to fool someone deliberately. Poet James Whitcomb Riley said, "When I see a bird that walks like a duck and swims like a duck and quacks like a duck, I call that bird a duck." Not always the case with canard.
鸭子歌还不错嘎嘎
2.例句涉及面多样(例句很重要)
涉及面business, arts/culture, fiction etc
例句来源reputable sources (“the Guardian” “Washington Posts” and “Wall Street Journals” .)
3.可以做QUIZ,虽然某quiz的答案有争议
(the “correct” answers are sometimes questionable—“ashen” and “livid”, for example, are mostly opposite).
nytimes只有例句,例句也不错,可是没有释义。
其他的网站如wordnik不如Vocabulary好的原因在例句,大家可以自行体会