life expectancy
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life expectancy
The statistically determined average length of time that an individual or population is expected to continue living from a certain point in time.
In den letzten Jahrzehnten ist die Lebenserwartung in vielen Ländern deutlich gestiegen.
In recent decades, life expectancy has risen significantly in many countries.
The word is made up of 'das Leben' (life), the linking -s, and 'die Erwartung' (expectation). So it literally means an 'expectation of life' in the sense of duration.
Eine gesunde Ernährung kann die Lebenserwartung positiv beeinflussen.
A healthy diet can have a positive influence on life expectancy.
'Lebenserwartung' (life expectancy) is often combined with the verbs 'steigen' (to rise), 'sinken' (to fall), or 'erhöhen' (to increase). Typical adjectives are 'hoch' (high), 'niedrig' (low), 'durchschnittlich' (average), or 'gestiegen' (increased).
Die durchschnittliche Lebenserwartung ist in den letzten 50 Jahren stark gestiegen.
Average life expectancy has risen sharply over the last 50 years.
To specify the group to which the life expectancy applies, you use the preposition 'bei' (+ dative). The duration is often given with 'von' (+ dative) or 'bei'.
Die Lebenserwartung bei Frauen ist im Durchschnitt höher als bei Männern.
Life expectancy among women is higher on average than among men.
lifetime
'Lebenszeit' and 'Lebenserwartung' both have to do with the length of a life. 'Lebenszeit' means the actual total time that someone lives or lived. 'Lebenserwartung', on the other hand, means an expected or average length of time, often based on statistics. You use 'Lebenserwartung' when talking about groups, countries, medicine, or forecasts. Learners may confuse the words because both sound like a duration of life. The important point is: 'Lebenszeit' is the actual time of a life, while 'Lebenserwartung' is an estimate or an average.
Die Lebenserwartung ist in vielen Ländern in den letzten Jahren gestiegen.
Life expectancy has risen in many countries in recent years.
In ihrer Lebenszeit hat meine Großmutter viele technische Veränderungen erlebt.
In her lifetime, my grandmother experienced many technological changes.