单丁 meaning in English

[旧时用语] (没有弟兄的青壮年男子) one without brothers; only son

Butyl cellosolve ( aka butyl glycol , ethylene glycol monobutyl ) is poisonous when swallowed and a lung - tissue irritant
丁赛路苏（如碱性丁二醇、乙二醇单丁醚）：吞食有毒，对肺组织有刺激作用。
In this paper , the nanometer - sized silica was organically grafted with tdi and ethylene glycol monobutyl ether , or by treated with silicohydride coupling agent ( k . h - 560 )
本文分别用tdi与乙二醇单丁醚接枝法和硅烷偶联剂kh - 560对纳米sio _ 2进行有机化处理。