The book is not one word too long and its narrative pace is unflagging.
这本书文字简洁，叙事流畅。
柯林斯例句
But market pressures are real and unflagging.
不过市场的压力却是真真切切,无可躲避.
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A persevering mind is one of the skills of carefully and unflagging practice.
恒心早起既是锻炼殷勤不懈的功夫之一.
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Remember that through desire, Goal setting and unflagging effort you can have anything you want.
记住,有愿望 、 有目标、有不懈的努力,你就能得到你想要的任何东西.
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"an indefatigable advocate of equal rights"
"a tireless worker"
"unflagging pursuit of excellence"
"unfailing loyalty"
"unfailing good spirits"
"unflagging courtesy"