Native speakers quote often "dilute" phonological characteristics of language they speak, especially in a colloquial conversation.

In Slavonic languages, this includes vowel length, vowel quality, loudness, tonal contour, and practically everything else. Note that native speakers intuitively strip off only those characteristics that do not prevent the comprehensibility (by other native speakers), but for a language learner this could be a critical change.

One property that mostly retains in rapid speech is "quality" of a stressed vowel. In other words, a stressed vowel never undergo any reduction.

Your nickname suggests that you are familiar with Chinese. So, in many cases, you can safely assume that stress in Slavonic languages is phonetically close to Chinese 4th (falling) tone, just like in "字", the last word of your nickname (我的名字). Just make sure to produce the tonal contour less vivid, or else your speech would look too emotional.

Native speakers quite often "dilute" phonological characteristics of language they speak, especially in a colloquial conversation.

In Slavonic languages, this includes vowel length, vowel quality, loudness, tonal contour, and practically everything else. Note that native speakers intuitively strip off only those characteristics that do not prevent the comprehensibility (by other native speakers), but for a language learner this could be a critical change.

One property that mostly retains in rapid speech is "quality" of a stressed vowel. In other words, a stressed vowel never undergo any reduction.

Your nickname suggests that you are familiar with Chinese. So, in many cases, you can safely assume that stress in Slavonic languages is phonetically close to Chinese 4th (falling) tone, just like in "字", the last word of your nickname (我的名字). Just make sure to produce the tonal contour less vivid, or else your speech would look too emotional.