The sound is virtually undetectable to the human ear.
这声音实际上是人耳难以听得到的。
1.They wear a subtle, almost undetectable smirk that makes you think they're about to make some kind of mischief.
他们用一种狡猾的不易察觉看似傻乎乎的态度让你觉得他们就像是在恶作剧。
2.After half a year after the general caches, almost undetectable wine of sulfide, make the existing liquor irritating greatly relieved.
一般经过半年的窖藏后，几乎检测不出酒中硫化物的存在，使白酒的刺激性大大减轻。
3.Like a criminal he began to fashion in his own mind the undetectable crime.
好像一个罪犯，他开始通盘考虑这件不能为外人发现的罪行。
4.Be careful to benchmark before making a decision on this basis: the overhead of Spring AOP proxying is all but undetectable in normal use.
在这个基础上做决定前要小心基准：SpringAOP代理的负载在通常使用中是无法觉察到的。
5.Also we would need the client that would function like a proxy. If you are able to make it undetectable, that will be an added advantage.
此外，我们需要的客户端的作用相当于一个代理。如果你能使其无法检测，这将是一个额外的好处。
6.One might conclude that the light beyond the Hubble distance would never reach us and that its source would be forever undetectable .
所以人们也许会断言，在哈伯距离以外的光，绝对到不了我们这里，因此便永远侦测不到它们的来源。
7.An ultrasonic signal that's undetectable to the human ear will scare off the varmint from up to 65 feet away.
一个人耳不能察觉的超声波信号会吓跑65多英尺以外的淘气动物。
8.And of the nine people who had undetectable levels of virus for at least 6 months, four carried HIV-infected HPCs.
而在九名至少六个月都未检测出HIV的人中有四名感染者的HPCs携带有病毒。
9.In rare situations, it is possible for an undetectable deadlock to occur.
在极个别的情况下，可能会发生无法检测到的死锁。
10.Autism is as yet undetectable before and immediately after birth. The average age of diagnosis is about five.
目前自闭症在孕期及出生后是难以即时检测的，平均确诊年龄约五岁。