Article in English: Use a fork to gently scrape through your salmon steak or fillet. When fish is cooked properly, it should break into flakes when nudged. If your fish feels dense or rubbery, it isn't cooked properly. To make sure your salmon is fully cooked, cut into it at its thickest point and inspect its color. Fully cooked fish should be opaque. If the salmon appears translucent, it needs to be cooked for longer. If you have access to a meat thermometer, use it to test the temperature of your salmon. Place the thermometer in the thickest part of your salmon and let it sit for a minute to get an accurate reading.  A well-cooked piece of salmon should reach 145 degrees Fahrenheit, or approximately 63 degrees Celsius. Use a digital meat thermometer for the clearest possible reading.

Summary in Chinese:
用叉子检查鱼肉是否会剥落。 检查三文鱼是否变得不透明。 检测鱼的温度。