抗酸剂是碱性的，通过中和胃容物中的酸来减轻疼痛。Antacids are alkaline and they relieve pain by neutralizing acid in the contents of the stomach.这种水呈强碱性的.This water is strongly alkaline.不正碱性的纸张, 其本质是恒定的, 不常无法矫侧.Acid paper, its nature is constant...
We needed to do decimals to round up and round down numbers.我们得把小数四舍五入成整数。...simple math concepts, such as decimals and fractions.简单的数学概念，如小数和分数We needed to do decimals to round up and round down numbers...我们得把小数四舍五入成整数。...
You may not enter the security area without authorization.未经批准不得进入警戒地区。Formal authorization for the trip was given last week.这次行程上周得到正式批准.Anglers are required to obtain prior authorization from the park keeper.垂钓者必须事先得到公...
所有颜色都会褪色——尤其是在阳光直射下。All colour fades— especially under the impact of direct sunlight.它们能够经受极端的气温和天气状况而不褪色、不破裂。They can withstand extremes of temperature and weather without fading or cracking.有些图片褪色严重。Some of the prints ...