skillful和skilled有区别吗?用法上

A smooth sea never made a skillful mariner
If we want to know the flavor of a pear, we must taste it on our own. If we want to be aware how high a mountain is, we should set our food on the narrow meandering footpath to climb to the top of it to afford a view down over. It is a daydream to chase the rainbow of overnight success. No other than going through hell while sailing against wind and waves, we can have an opportunity to catch sight of it. No one would believe that a smooth sea could make a skillful mariner.
Better to slip with the foot than with the tongue. We should put what we are going to do to the practice. First of all, It is important to lay a plan for our program, the plan should consist of what to do and how to do. In the next place, we should start with the first step. Perhaps, we will get off on the wrong foot (一开头就不顺利). Don't be afraid, it is natural there will be misstep in front of us, but failure is mother of success. I believe, however, once we get our foot on the ladder (跨出成功的第一步), The good beginning is to be half done.
Let's bigin! let's step forward! After hardening ourselves over the wind and waves, I am sure we must be the skillful mariners.

Had it not been for two particularly skillful members of the work crew其实是if it had not been for two particularly skillful members of the work crew
虚拟语气里的条件状语从句中可以把if省略 然后把后面的助动词放到句首

拿endangered举例
你把这些词放到baidu的搜索栏中,
然后在搜索结果上方会出现,如下：
您可以在支持英汉互译的百度词典中查看endangered的解释
再点击那个单词,你就看到了

一些昆虫很会装成别的样子.

确保航行成功的不是船本身而是娴熟的航海技术.
地道的翻译就不能直译.
百度教育团队【海纳百川团】为您解答
请点击“选为满意答案”按钮,

这两个短语在表示做某事很有技术的情况下几乎是相同的意思,但是一般人们习惯用at ;
表示在某方面或领域很在行时用in

用 skilled 因为 是形容人或工作的
skillful 常和 at ,in 是熟练某个技术的

ZIJIXIE

正确答案是：No error（没错）.
除了你录入时的句首没大写,:)

one must gain his experiences from dealing with difficulties

skilled 是熟练的 ;
skillful灵巧的;熟练的;制作精巧的
此外,前者用在系动词后做表语主要修饰人；后者还可以做定语修饰名词．

1.这是虚拟语气当中的一种情况
If it had not been for sth.,sb.could/ would not have done sth.
前面是过去完成时 had not been ,后面是现在完成时 have done
这是这种用法的特点
这句话是表示 如果没有了sth.的帮助,sb.将不可能完成某事
那么把最开始那种结构套到本题中,就是
If it had not been for two particularly skillful members of the work crew,we could
not have completed the apartment renovations on schedule.
如果没有了……的帮助,我们将不能按时完成
2.而这题还涉及到另一个知识点
if it had not been 可以变成 had it not been
if it should not been 可以变成 should it not been
if it were not been 可以变成 were it not been
这是虚拟语气中的特殊用法,都是把if省掉,然后it后面的助动词提到前面来,表示如果不是……的话
正如你这题,本来是If it had not been for ,现在就变成了had it not been for,其实两个都是OK的~

that 后的句子做定语修饰dog 没有问题

没区别
二者相等

B 完美的 翻译：Veronica 能非常熟练的使用各种复杂的实验仪器,使她成为了一个完美的研究员.