属于
to be classified as; to belong to; to be part of
数域
number field (math.); subfield of the field of complex numbers
疏于
to fail to pay sufficient attention to; to be negligent in regard to; to be lacking in
薯蓣
Chinese yam (Dioscorea opposita)
树欲静而风不止
lit. the trees long for peace but the wind will never cease (idiom); fig. the world changes, whether you want it or not
殊域周咨录
Ming dynasty record (1574) of exploration and foreign relations
疏于防范
to neglect to take precautions; relaxed vigilance