Getting into a good economics program has become very difficult, as is obtaining well-paid academic job in a desirable location.However, American economists are not worse-off.
However, the problem of test pattern generation becomes very difficult as the size of circuits increases.
A comparison of the proposed model with the models available in the literature becomes very difficult as the performance of a model is heavily dependent on the data and it is influenced by various parameters such as geographical locations and forecast out samples.
Airflow limitation is usually progressive; thus daily activities can become very difficult as the condition gradually worsens.
It suddenly became very difficult to find parking spaces as lines of Trabants motored into town, ferrying owners to Hof who were keen to taste the fruit of the forbidden West.
As the children grew older and bigger, it became very difficult for the mothers to carry the children around.
"Things suddenly just became very difficult for me.
So it became very difficult to have the conversation".
Everything became very difficult for me.
As biological networks became larger over time, consisting of thousands of nodes and connections, the so-called 'hairball' effect, where many nodes are densely connected with each other became very difficult to cope with.
