New words：

stern [stə:n] adj. 严厉的；严峻的；苛刻的
sternly ['stə:nli] adv. 严厉地；严肃地

Sample Sentences：

Her mother looked sternly at the boy.
She had a stern father who never praised her.
Even one minute’s lateness would earn a stern rebuke.

lateness ['leitnis] n. 迟；晚
rebuke [ri'bju:k] n. 指责；责备；斥责；训斥

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