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He it is Who sendeth down water from the sky, whence ye have drink, and whence are trees on which ye send your beasts to pasture. 10 With this water He produces for you crops, and olives, and dates, and grapes, and all kinds of fruit; indeed in this is a sign for people who ponder. 11 And He hath constrained the night and the day and the sun and the moon to be of service unto you, and the stars are made subservient by His command. Lo! herein indeed are portents for people who have sense. 12 And the things on this earth which He has multiplied in varying colours (and qualities): verily in this is a sign for men who celebrate the praises of Allah (in gratitude). 13 It is He who has subjected the sea to you, so that you eat of its soft flesh and bring up from it ornaments which you wear. And you see the ships plowing their course through it in order that you seek His bounty and give thanks. 14 He set firm mountains upon the earth lest it should shake with you; and rivers, and roads, in order that you are guided. 15 as well as [various other] means of orientation: for [it is] by the stars that men find their way. 16 Is He then Who creates like him who does not create? Do you not then mind? 17 For, were you to count the favours of Allah, you will not be able to count them. Surely Allah is Ever Forgiving, Most Merciful. 18 And Allah knows what you conceal and what you disclose. 19 But those whom you invoke, other than Allah do not create anything they are themselves created. 20 They are, [in fact], dead, not alive, and they do not perceive when they will be resurrected. 21
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ملاحظات وتعليمات
Notes and Instructions
كيف تعمل منظومة تمارين الحفظ؟ عند أدنى مستوى 0، تكون كل الكلمات ظاهرة. بينما يُخفي أعلى مستوى 9 كل الكلمات. فكيف تعمل المستويات المتوسطة، مثل 3، على سبيل المثال؟ قد تعتقد بأن المنظومة تخفي 3 من كل تسع كلمات بدقة. ليس تماما! في المستوى 3، لكل كلمة فرصة اختفاء بنسبة 3 من 9، و6 من 9 لتكون ظاهرة. بمعنى آخر، من الممكن، ولكن باحتمال شبة معدوم، أن تكون جميع كلمات المستوى 3 مخفية، أو أن تكون جميعها ظاهرة! وكذلك أيضًا، ففي المستويات المتوسطة، وبما يتناسب مع مستوى الصعوبة، يمكن أن تكون المخابئ غير كاملة أو شفافة جزئيًا بحيث تظهر الكلمات جزئيًا تحتها.
How does the memorization exercise algorithm work? At the lowest level 0, all words are visible. While the highest level 9 hides all words. What about at mid-level, like 3, for example? You might think that the algorithm hides precisely 3 out of every nine words. Not quite! At level 3, each word has a 3 out of 9 chance to hide, and 6 out of 9 to be visible. In other words, it is possible, but highly unlikely, for all words at level 3 to be hidden, or, that all of them to be visible! Also, at mid-levels, and in proportion to the difficulty level, hideouts can be partially incomplete or transparent so that words may be partially visible underneath.