4.22

(1)authenticity

n.确定性，真实性

eg.The authenticity of the manuscript is beyond doubt.

(2)avail

n.效用，帮助

v.有利于，有助于

availability n. 可用性，实用性

of /to no avail 没有用，无结果

eg.We made repeated attempts but to no avail.

(3)aviation

n.航空，飞行

eg.Tom wanted to study aviation,but his eyesight was not good enough.

(4)axis

n.轴线，中心线，坐标轴

eg.He plotted the temperatures on the horizontal axis.

(5)baffle

vt.使困惑，使难倒

eg.It is a mystery that has baffled doctors for decades.

(6)barren

a.贫瘠的，荒芜的

be barren of ……没有……

eg.His writing is barren of insight.

(7)batch

n.一批，一批生产的量

eg.The letters were sent out in bathes.

(8)batter

v.连续猛击，撞击

n.面糊

eg.He kept battering at the door.

(9)bewilder

vt.使迷惑

eg.She was bewildered to find them gone.

(10)bias

v/n.偏见，偏心

have a bias towards /for  偏爱

have a bias against 对……有偏见，憎恶

eg.The university has a bias towards/against the science.