If you are a non-native speaker trying to learn how to pronounce "science," the key is to practice and stay patient. Science is pronounced as "sahy-uhns," and each syllable should be spoken clearly and evenly.

When saying the word, start with the consonant sound of the letter "s," which is a voiced alveolar fricative. The sound of the letter "s" should be light and airy. Make sure to move your tongue to the back of your mouth to produce the correct sound.

Next, move on to the vowel sound of the letter "i." This is a short "i" sound, and the middle of your tongue should be raised close to the roof of your mouth. Try to aim for a high, short sound.

After that, pronounce the letter "e," which is a short "e" sound. This should sound like the letter "a" in the word "cat," and should be pronounced with a low tongue in the mouth.

Finally, the letter "ns" should be pronounced together as the "n" sound followed by the "s" sound. The "n" sound is a nasal sound, and should be made using the back of your tongue and the roof of your mouth.

Practicing these four simple steps should help you pronounce "science." Just remember to practice, be patient, and stay focused. With enough practice, you'll soon be saying "science" perfectly!