The Mia browser extension captures any word or short phrase you select — together with the sentence you found it in — and syncs it straight into your library. Chrome Web Store listing pending; install it in 30 seconds meanwhile:
chrome://extensions and turn on Developer mode (top right)Select a word or short phrase on any page → click ★ Save to Mia. A card pops up with the phonetic, a plain-English meaning for the exact sense in your sentence, and a 中文 button when you need it. The word lands in your library — and Mia will start weaving it into your conversations.