In a sentence, you typically use "through" to describe a process or action, and "under" to specify the conditions or circumstances under which the action takes place.

In a sentence, you typically use "through" to describe a process or action, and "under" to specify the conditions or circumstances under which the action takes place:

The team achieved success through hard work and dedication, even under challenging conditions.

In the example above, "through hard work and dedication" describes the means of achieving success, while "under challenging conditions" specifies the circumstances in which this success was achieved.

Another example:

Mary learned to speak fluent Spanish through immersive study, even under the constraints of a busy schedule.

You can use "through" and "under" in a wide range of contexts, including:

• Educational Achievement:

  John excelled in his studies through consistent effort, even under less than ideal learning conditions.

• Professional Development:

  Through his innovative ideas and hard work, Peter advanced in his career, thriving even under challenging market dynamics.

• Artistic Creation:

  The artist developed a unique painting style through experimentation, often working under limited light in his studio.

• Physical Training:

  Through rigorous training sessions, the athlete enhanced her endurance, often training under extreme weather conditions.

• Psychological Resilience:

  Sarah maintained her positive outlook through self-care and mindfulness, even under the stress of her demanding job.