should start

Started   1.                   vp (were)   2.                     were to +v原   3.                   should+ v原   should start   produce V   product N   production= out put   Security system   Mean to do   Mean doing   prefer A to B   Clearly----obviously   person----personality   enlarge   deepen   sharpen   minimum   sharpener   be aware of ---be unaware1 of   He is not aware of his pain at all.   Accurate   At ease   This medicine can ease your pain.   Encounter   Begin to do = begin doing   Start to do = start doing   Supply sb. With sth.

1 unaware   

a.不知道的，未意识到的

参考例句：

• They were unaware that war was near. 他们不知道战争即将爆发。
• I was unaware of the man's presence. 我没有察觉到那人在场。