watchful
US
UK watchful adj: (vigilant)
SC 警觉地 jǐng jué de
TC 警覺地
TC 警覺地
SC 警惕地 jǐng jué de ，jǐng tì de
The sentries remained watchful throughout the night.
watchful eye n: (attention, vigilance)
SC 留心 liú xīn
TC 留心
TC 留心
SC 注意 liú xīn，zhù yì
TC 注意
TC 注意
SC 密切关注 liú xīn，mì qiè guān zhù
TC 密切關注
TC 密切關注
Sue kept a watchful eye as the children played on the seashore.