“敏锐的”的英语？

“敏锐的”的拼音为：...

他机智诙谐，具有敏锐的商业头脑。He was witty, amusing and gifted with a sharp business brain.布兰德敏锐的耳朵听出了口音。Brand's keen ear caught the trace of an accent.观察敏锐的步行者可能在这一路段看到赤鹿。Observant walkers may see red deer along this stretch of ...