However, if one is not careful, there is a danger that the foreign teachers' classes can be seen as 'entertainment' and not treated seriously.

不管怎样，如果一个人不用心学的话，那外教的课很有可能被看成一种“娱乐”而且并不严肃的对待它。

youdao

However, the New Zealand Meteorological Service has warned that flights passing over this area should be extra careful to avoid any accidents.

但新西兰气象局警告说，途经该海域上空的航班要多加小心，避免发生故障。

youdao

One has to be careful about doing this however, as it can create a circular reference that will interfere with both the Lisp and.net garbage collectors.

不过要这样做必须小心从事，因为这样可能会创建出一个循环引用，从而扰乱Lisp和。NET的垃圾收集器。

youdao

Be very careful, however, that whatever you produce for inventory has a market beyond the first customer, and be careful that you only take orders that are well within your expertise.

FORBES: Art and the Economics of Production to Order, for Inventory, or Something In Between

However, you do need to be careful that the school you choose is not just a diploma mill.

FORBES: Avoiding the Diploma Mill - How to Choose an Online School

However, I warned would-be thieves that careful planning is required to increase the odds of success.

FORBES: How to Steal a Lot of Money: Part II in a Series