黑色外套看起来总是很潇洒，而且永远也不会落伍。A black coat always looks smart and will never date.游客们偷偷地取笑当地人落伍的做法和衣着。The tourists snigger at the locals' outdated ways and dress.总统常常认为教会属于落伍之物。The President tended to regard the Church as ...
使用牙刷去除牙垢很有帮助.The use of a toothbrush to keep tartar down is very helpful.除牙垢用带尖工具除去牙齿表面的 ( 污垢 )To remove ( tartar ) from tooth surfaces with a pointed instrument.我的牙齿上有许多牙垢.I have a lot of tartar on my teeth....