出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第176页（254字）
不让心里的打算从话音和脸色上流露出痕迹来，例他不露声色地勤奋苦练，以期获得这次校运会的最高荣誉。
He kept his intentions to himself，practising regularly and hard，in the hope that he could win the highest prize offered by the school at its athletic meet．