吃透英语课本，提升在校竞争力
v. 握紧；捏紧；咬牙切齿
n. 抓紧；咬紧；抓紧用具
现在分词：clenching
第三人称单数：clenches
过去式：clenched
过去分词：clenched
a cigar clenched between his teeth
他叼在嘴里的一支雪茄
Jody was pacing the sidelines, her fists clenched.
乔迪在球场的边线上紧握着拳头来回踱步。
vi.握紧；钉牢
hammer on
nail up
vt.紧握；确定；把…敲弯
confirm
identify
