The phrase "activities can only be" is correct and usable in written English.
You can use it when discussing limitations or specific conditions regarding activities.
Example: "In this program, activities can only be conducted during designated hours to ensure safety."
Alternatives: "activities must solely be" or "activities are restricted to".
"If schools follow government-approved curriculums, some activities can only be done in a [bigger] group.
"These activities can only be done when deemed safe, as per weather and tidal conditions and in accordance with international maritime health and safety protocols," the statement said.
While certain activities can only be performed either physically or virtually a customer can't get the feel of a fabric over the Internet, for example—many activities can be distributed between the two realms.
In the RCPSP-ROC, activities can only be executed in a single mode and, therefore, with one specific value for duration and resource consumptions.
Both work and leisure activities thus impose a schedule constraint on workers, meaning that these activities can only be performed at specific times or within a specified time frame.
However, graduate assistants do not lectures but rather they supervise tutorial, seminar presentations and practical., It also identifies that university teaching activities can only be conducted by staff with a master's and Ph.D. qualification for undergraduate programmes and staff with Ph.D. qualifications for postgraduate degree programmes (TCU 2014).
MutH binds to hemi-methylated GATC sites but its latent endonuclease activity can only be activated through association with the MutL-MutS complex.
The mechanism by which these extracts exhibited their antitrypanosomal activity can only be speculated since the active ingredient(s) were not isolated.
HydA is nuclear-encoded by the hydA gene, and its transcription and activity can only be observed under anaerobic or sulfur-deprived conditions.
"Such an activity can only be seen as an abject failure of the deployment, a gross abuse of their role and their position as a police officer and an individual and organisational failing.
Today, many countries in southern Europe have booming shadow economies with Greece especially notable, though the scale of underground activity can only be measured indirectly.
