今天我们要学的词是 keen. Keen的意思是踊跃、热衷，常常跟一个介词联用。The United States is keen to invest in Greenland for its strategic importance to the U.S. military and its ballistic missile early warning system. 美国热衷于在格陵兰岛投资，因为那里对美国军方及其弹道导弹预警系统具有战略重要性。Moscow is keen on strengthening ties with Turkey, at a time when Ankara's relations with the United States are at their lowest. 在土耳其与美国关系陷入底谷之际，莫斯科热衷于加强与安卡拉的关系。