41. Who's learned how to use a tool to get food.इस्तेमाल कर के भोजन पाना सीख चुकी है। 42. What Cristine did was use our Blicket Detectors.इस्तेमाल किया। 43. Service your boiler once a year so it runs smoothly and safely throughout the year.इस्तेमाल करना 44. Applied on a large scale.इस्तेमाल ही नहीं किया जाता। 45. The amount of energy used by its inhabitants.इस्तेमाल करेंगे. 46. To slash our product use, slash our transportation use,इस्तेमाल करने की, कम वाहन इस्तेमाल करने की, 47. To slash our product use, slash our transportation use,इस्तेमाल करने की, 48. Using a technique that we're using all over the worldइस्तेमाल करते हुए 49. That if I use too much of my carbon allowance,इस्तेमाल करती हूँ, 50. And they were constructed for fields that were too large.इस्तेमाल के लिये ही बनायी गयी थी।
