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nonreturn

[ˌnɒnrɪ'tɜːn, ˌnɑːnrɪ'tɜːrn] n
scub. 逆流防止阀
nonreturn [ˌnɒnrɪ'tɜːn, ˌnɑːnrɪ'tɜːrn] adj.
gen. 不返回的; 不倒转的; 止逆的; 止回的
nonreturn
: 36 phrases in 14 subjects
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