The eagles perched on their eyries.老鹰栖息在他们的巢窝上.There are three types of aquifers: perched, unconfined, and confined.含水层有三种形态, 分别是上层滞水 、 潜水和承压水.The town is perched on the edge of a steep, precipitous cliff.该镇坐落在陡峭险峻的悬崖边上。...

高氯酸乙酰酯...

acetylperchlorate的音标：acetylperchlorate的英式发音音标为：[æsɪtɪlpərk'lɔ:rɪt]acetylperchlorate的美式发音音标为：[æsɪtɪlpərk'lɔrɪt]...

n.anaemia 高色（指数）性贫血...