Working hard in a room where words were hard to hear
1A team prepares an audio guide for a small exhibition. The volunteers work hard to organise the recordings, but effort alone does not make every recording easy to understand. During a test, a fan makes so much noise that Sora can hardly hear the speaker. She catches a few isolated words, not enough to follow the explanation.
2The team moves to a quieter room and repeats the test with the same speaker and the same text. Sora can now follow the explanation. She does not say that the volunteers had previously made no effort. She distinguishes how hard they worked from how clearly the words reached the listener.
3A learner's review card says, 'They worked hardly, so Sora heard every word.' The team corrects both parts. The volunteers worked hard, while Sora could hardly hear the speaker in the noisy room. Keeping the contrasting facts together is more useful than treating hardly as a longer spelling of hard. The test describes this recording situation, not every possible reason why a listener might miss words.