(caulk, acoustic, default, acquiesce, defection)
709. caulk [kɔːk]
vt. 填隙使不渗水；捻缝；凿密
caulk: 填塞使不渗水 | 堵缝| 捻缝
710. acoustic [ə'kuːstɪk]
n. 原声乐器；不用电传音的乐器
adj. 声学的；音响的；听觉的
n. (Acoustic)人名；(法)阿库斯蒂克
acoustic: 听觉的 | 声学的 | 声的
在“不插电”演唱会上，乐队所用的乐器大都是acoustic instruments，如acoustic guitar；acousticbass，acoustic与electronical（电子的）相对，意思是“非电声乐器（的）”。
711. default [dɪ'fɔːlt;'diːfɔːlt]
a)Failure to perform a task or fulfill an obligation, especially failure to meet a financial obligation:
未履行；拖欠：未执行任务或履行义务，尤指未履行财政上的义务：
in default on a loan.
拖欠贷款
2)Failure to make a required court appearance.
【法律】 未到庭：被要求出庭时未到席
3)The failure of one or more competitors or teams to participate in a contest:
弃权：一个或多个竞争者或运动队未参加比赛：
won the championship by default.
由于别人的弃权而获得冠军称号
4)Computer Science A particular value for a variable that is assigned automatically by an operating system and remains in effect unless canceled or overridden by the operator.
【计算机科学】 缺省，默认：某一变量的特定值，由操作系统自动指定并持续有效，除非操作者取消它或使它无效
712. acquiesce[,ækwɪ'es]
vi. 默许；勉强同意
acquiesce: 默许 | 勉强同意 | 默认
They are too law-abiding and too acquiescent.他们太守法,太温顺了.
My brother is of the acquiescent rather than the militant type.我弟弟是属于服从型的而不是好斗型的。
He acquiesced in the plans his parents had made for him.
713. defection[dɪ'fekʃn]
n. 背叛；缺点；变节；脱党
Defection: 反水 | 投诚| 倒戈
(caulk, acoustic, default, acquiesce, defection)
(中西交流网http://blog.sina.com.cn/u/2811577355 辑)
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