If you don't have much extra water for cleaning and rinsing, put 2 drops of iodine into the jar, add water, and swirl it all around to sanitize. Rinse out jar, cover, and keep waiting. You also could put the jar into the oven for about 10 minutes at 285°F or 140°C if it is only made of glass or ceramic. Using about a 1/4 cup of vinegar per gallon of tea also works. This keeps the pH low to prevent any foreign molds or yeast from growing while the tea is getting started. To make sure it's acidic enough, measure the pH (optional). It should be below 4.6 pH. If not, keep adding starter tea, vinegar or citric acid (not Vitamin C; that's too weak) until the desired pH is reached.  Temperature should be consistently at least 70ºF (21ºC). 86ºF (30ºC) is best if you can manage. Lower temperatures will make it grow slowly, but below 70ºF makes it more likely that unwanted organisms will start growing too. When the tea starts to get smelly like vinegar, you can start tasting it and checking pH levels.  The culture will sink or float or do something in between. It is better that the mushroom floats on top to block aspergillus contamination. The best way to pull a sample is with a straw. Don't drink directly from the straw, as backwash may contaminate the tea. Also, do not dip the test strip into the brewing vessel. Instead, dip the straw about halfway into the tea, cover the end with your finger, pull the straw out and drink the liquid inside or put that liquid on the test strip. If the kombucha tastes very sweet, it probably needs more time for the culture to consume the sugar. A pH of 3 tells you that the brewing cycle is complete and the tea is at the correct point to drink.  Of course this can vary a bit to suit your needs and taste. If this final pH is too high, then either the tea will need a few more days to complete the brewing cycle, or it should be chucked.

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Write a summary of the previous text in Chinese:
把一个广口的瓶子在水槽里用温度非常高的开水洗干净，彻底地涮一涮。 茶凉了以后，把它倒进玻璃广口瓶，然后加入已制好的茶引子，引子要占到全部液体的10%左右。 轻轻地把培养物放进茶里，把广口瓶的口用布盖起来，并用橡皮筋扎紧。 把瓶子放到温暖阴暗的地方，不要去“打扰”它。 等上一个星期。