Any spot in the chromatogram obtained with the test solution, apart from the principal spot and any spot corresponding to impurity A is not more intense than the spot in the chromatogram obtained with reference solution (b) (0.5 per cent) and not more than two such spots are more intense than the spot in the chromatogram obtained with reference solution (c) (0.2 per cent).

最先给出正确答案（或最接近正确答案）的奖励20分，另选两个最积极谈论问题的每人奖励10分。请大家凭自己的力量翻译，使用翻译软件或单纯引用别人的回复都视为灌水，删帖并扣除积分和声望。
背景：这是美国药典上测定某药物中有关物质的一段文字。上下文：
Apply to the plate 10 µl of each solution. Develop over a path of 10 cm using a freshly prepared mixture of 2.5 volumes of concentrated ammonia R, 32.5 volumes of acetone R, 24.5 volunes of ethanol R, 10.5 volumes of water R and 35 volumes of toluene R, prepared in the order given. Dry the plate in a current of air. Spray with potassium iodobismuthate solution R and dry for 15 min in a current of air. Spray with dilute hydrogen peroxide solution R. Any spot corresponding to impurity A in the chromatogram obtained with the test solution is not more intense than the corresponding spot in the chromatogram obtained with reference solution (a) (0.5 per cent). Any spot in the chromatogram obtained with the test solution, apart from the principal spot and any spot corresponding to impurity A is not more intense than the spot in the chromatogram obtained with reference solution (b) (0.5 per cent) and not more than two such spots are more intense than the spot in the chromatogram obtained with reference solution (c) (0.2 per cent). The test is not valid unless the chromatogram obtained with reference soutlion (a) shows two such clearly separated spots and the spot in the chromatogram obtained with reference solution (d) is clearly visible.

答案揭晓：见Tina的回帖。
Tina的翻译是最正确且最通顺的，奖20分。
orionwei第一个回帖，且意思基本正确，奖10分。
rogerhuang009非常积极，奖10分。