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sentry
 Sentry
space 步哨
| signal
 signal
gen. 打信号

noun | verb | to phrases
sentry ['sentrɪ] n
gen. 卫〔哨〕兵; 步哨; 警卫; 看守; 望楼
Sentry ['sentrɪ] n
space 步哨 (美国战术防御雷达)
sentry ['sentrɪ] v
gen. 设岗哨; 站岗; 放哨
sentry: 30 phrases in 7 subjects
Automobiles8
Biology2
Desert science1
General13
Military1
Mountaineering1
Technology4