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It is He who sends down to you out of heaven water of which you have to drink, and of which trees, for you to pasture your herds, 10 With it He causes to grow for you the crops, the olives, the date-palms, the grapes, and every kind of fruit. Verily! In this is indeed an evident proof and a manifest sign for people who give thought. 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 [He has subjected] whatever He multiplied for you on the earth of varying colors. Indeed in that is a sign for a people who remember. 13 It is He who has subdued the sea that you may eat fresh meat from it, and obtain ornaments to wear. You see the ships plough through it that you may seek of His bounties and, perhaps, be grateful. 14 And he has placed firm mountains on earth, lest it sway with you, and rivers and paths, so that you might find your way, 15 And landmarks. And by the stars they are [also] guided. 16 Is then the One Who creates like the one who does not create? Will you not, then, take heed? 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 Allah knows all that you conceal and all that you disclose. 19 Those unto whom they cry beside Allah created naught, but are themselves created. 20 Dead are they, not alive; and they perceive not when they will be raised up. 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.