您要查找的是不是：
- Riots are of frequent occurrence in this province. 这省经常发生骚乱。
- Heartburn and sour "acid" eructations are frequent. 常有烧心感和嗳酸。
- He is a frequent visitor to our house. 他是我们家的常客。
- He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
- She was a frequent visitor to the gallery. 她经常参观这个美术馆。
- Acid irritates the stomach lining. 酸能刺激胃黏膜。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- This is the bar that harlots frequent. 这是个妓女们常出入的酒吧。
- John likes to frequent the bars. 约翰喜欢经常出入酒吧。
- The crops suffered from frequent blights. 农作物经常遭受病虫害。
- I am doing an experiment of neutralizing acid. 我在做一个中和酸的实验。
- He suffers from frequent bouts of depression. 他患多发性抑郁症。
- Can Jones beat Smith? That's the acid test. 琼斯能击败史密斯吗？那是个严峻的考验。
- His frequent hesitations annoyed the audience. 他三番五次欲言又止，听众已感到厌烦。
- A salt or an ester of boric acid. 硼酸盐一种硼酸盐或硼酸酯
- She dropped acid in high school. 她高中时代服迷幻药。
- There are frequent trains running between London and Brighton. 伦敦与布莱顿之间火车班次很多。
- The metal is fretted with the acid. 金属被酸腐蚀。
- Their frequent rows took the bloom off their marriage. 他们经常吵架，使得美满婚姻恶化。
- The chemical can behave as an acid. 这种化学制品能起酸的作用。
